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Update Notes on WSJT-X Installation for Mac OS X.
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Uwe Risse
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Notes on WSJT-X Installation for Mac OS X
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Notes on WSJT-X Installation for Mac OS X
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If you have already downloaded a previous version of WSJT-X then I suggest
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If you have already downloaded a previous version of WSJT-X then I suggest
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you change the name in the Applications folder from WSJT-X to WSJT-X_previous
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you change the name in the Applications folder from WSJT-X to WSJT-X_previous
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before proceeding.
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before proceeding.
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I recommend that you follow the installation instructions especially if you
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I recommend that you follow the installation instructions especially if you
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are moving from v2.5 to v2.6 or later, of WSJT-X or you have upgraded macOS.
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are moving from v2.5 to v2.6 or later, of WSJT-X or you have upgraded macOS.
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Double-click on the wsjtx-...-Darwin.dmg file you have downloaded from K1JT's web-site.
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Double-click on the wsjtx-...-Darwin.dmg file you have downloaded from K1JT's web-site.
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Make sure that you leave this window open for the remaining installation steps.
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Make sure that you leave this window open for the remaining installation steps.
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Now open a Terminal window by going to Applications->Utilities and clicking on Terminal.
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Now open a Terminal window by going to Applications->Utilities and clicking on Terminal.
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Along with this ReadMe file there is a file: com.wsjtx.sysctl.plist which must be copied to a
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Along with this ReadMe file there is a file: com.wsjtx.sysctl.plist which must be copied to a
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system area by typing these lines in the Terminal window and then pressing the Return key after
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system area by typing these lines in the Terminal window and then pressing the Return key after
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each line.
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each line.
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sudo cp /Volumes/WSJT-X/com.wsjtx.sysctl.plist /Library/LaunchDaemons
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sudo cp /Volumes/WSJT-X/com.wsjtx.sysctl.plist /Library/LaunchDaemons
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sudo chown root:wheel /Library/LaunchDaemons/com.wsjtx.sysctl.plist
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sudo chown root:wheel /Library/LaunchDaemons/com.wsjtx.sysctl.plist
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you will be asked for your normal password because authorisation is needed to copy this file.
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you will be asked for your normal password because authorisation is needed to copy this file.
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(Your password will not be echoed but press the Return key when completed.)
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(Your password will not be echoed but press the Return key when completed.)
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IMPORTANT: Now re-boot your Mac otherwise these changes will not take effect.
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IMPORTANT: Now re-boot your Mac otherwise these changes will not take effect.
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After the reboot you should re-open the Terminal window as before and you can check
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After the reboot you should re-open the Terminal window as before and you can check
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that the change has been made by typing:
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that the change has been made by typing:
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sysctl -a | grep sysv.shm
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sysctl -a | grep sysv.shm
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If shmmax is not shown as 52428800 then contact me since WSJT-X will fail to load with
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If shmmax is not shown as 52428800 then contact me since WSJT-X will fail to load with
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an error message: "Unable to create shared memory segment". If the value of shmmax
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an error message: "Unable to create shared memory segment". If the value of shmmax
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is shown as 20971520 then it is probable that you have download JTDX. WSJT-X and JTDX
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is shown as 20971520 then it is probable that you have download JTDX. WSJT-X and JTDX
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cannot both control the shmmax paramter. Contact me for advice.
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cannot both control the shmmax parameter. Contact me for advice.
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You can now close the Terminal window. It will not be necessary to repeat this procedure
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You can now close the Terminal window. It will not be necessary to repeat this procedure
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again, even when you download an updated version of WSJT-X. It might be necessary if you
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again, even when you download an updated version of WSJT-X. It might be necessary if you
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upgrade macOS.
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upgrade macOS.
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Drag the WSJT-X app to your preferred location, such as Applications.
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Drag the WSJT-X app to your preferred location, such as Applications.
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You need to configure your sound card. Visit Applications > Utilities > Audio MIDI
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You need to configure your sound card. Visit Applications > Utilities > Audio MIDI
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Setup and select your sound card and then set Format to be "48000Hz 2ch-16bit" for
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Setup and select your sound card and then set Format to be "48000Hz 2ch-16bit" for
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input and output.
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input and output. On rare occasions problems with audio output to your rig can be
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corrected if you select 44100Hz for output format.
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Now double-click on the WSJT-X app and two windows will appear. Select Preferences
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under the WSJT-X Menu and fill in various station details on the General panel.
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Now double-click on the WSJT-X app and two windows will appear. Select Preferences
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I recommend checking the 4 boxes under the Display heading and the first 4 boxes under
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under the WSJT-X Menu and fill in various station details on the General panel.
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the Behaviour heading.
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I recommend checking the 4 boxes under the Display heading and the first 4 boxes under
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the Behaviour heading.
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Depending on your macOS you might see a pop-up window suggesting that wsjtx wants to use the
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microphone. What this means is that audio input must be allowed. Agree.
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Depending on your macOS you might see a pop-up window suggesting that wsjtx wants to use the
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microphone. What this means is that audio input must be allowed. Agree.
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Next visit the Audio panel and select the Audio Codec you use to communicate between
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WSJT-X and your rig. There are so many audio interfaces available that it is not
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Next visit the Audio panel and select the Audio Codec you use to communicate between
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possible to give detailed advice on selection. If you have difficulties contact me.
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WSJT-X and your rig. There are so many audio interfaces available that it is not
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Note the location of the Save Directory. Decoded wave forms are located here.
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possible to give detailed advice on selection. If you have difficulties contact me.
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Note the location of the Save Directory. Decoded wave forms are located here.
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Look at the Reporting panel. If you check the "Prompt me" box, a logging panel will appear
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at the end of the QSO. Visit Section 11 of the User Guide for information about log files
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Look at the Reporting panel. If you check the "Prompt me" box, a logging panel will appear
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and how to access them.
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at the end of the QSO. Visit Section 11 of the User Guide for information about log files
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and how to access them.
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Finally, visit the Radio panel. WSJT-X is most effective when operated with CAT
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control. You will need to install the relevant Mac device driver for your rig,
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Finally, visit the Radio panel. WSJT-X is most effective when operated with CAT
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and then re-launch WSJT-X. Return to the Radio panel in Preferences and in
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control. You will need to install the relevant Mac device driver for your rig,
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the "Serial port" panel select your driver from the list that is presented.
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and then re-launch WSJT-X. Return to the Radio panel in Preferences and in
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the "Serial port" panel select your driver from the list that is presented.
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You may need a device driver for your Mac. The USB/UART Bridge chip inside the Icom,
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Yaesu and Kenwood radios is a Silicon Labs USB to UART Bridge Controller and the Mac
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You may need a device driver for your Mac. The USB/UART Bridge chip inside the Icom,
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drivers are available here:
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Yaesu and Kenwood radios is a Silicon Labs USB to UART Bridge Controller and the Mac
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drivers are available here:
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https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
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https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
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Visit the SiLabs site and download v6 for a Mac. Then in WSJT-X if you use the drop-down menu
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for Serial Port you should see something like /dev/tty.SLAB_USBtoUART if the driver has been
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Visit the SiLabs site and download v6 for a Mac. Then in WSJT-X if you use the drop-down menu
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installed correctly. Make sure you read the release notes that come with the driver.
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for Serial Port you should see something like /dev/tty.SLAB_USBtoUART if the driver has been
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installed correctly. Make sure you read the release notes that come with the driver.
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WSJT-X needs the Mac clock to be accurate. Visit System Preferences > Date & Time
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and make sure that Date and Time are set automatically. The drop-down menu will
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WSJT-X needs the Mac clock to be accurate. Visit System Preferences > Date & Time
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normally offer you several time servers to choose from.
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and make sure that Date and Time are set automatically. The drop-down menu will
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normally offer you several time servers to choose from.
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On the Help menu, have a look at the new Online User's Guide for operational hints
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and tips and possible solutions to any problem you might have.
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On the Help menu, have a look at the new Online User's Guide for operational hints
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and tips and possible solutions to any problem you might have.
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Please email me if you have problems.
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Please email me if you have problems.
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--- John G4KLA (g4kla@rmnjmn.co.uk)
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--- John G4KLA (g4kla@rmnjmn.co.uk)
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Addendum: Information about com.wsjtx.sysctl.plist and multiple instances of WSJT-X.
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Addendum: Information about com.wsjtx.sysctl.plist and multiple instances of WSJT-X.
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WSJT-X makes use of a block of memory which is shared between different parts of
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the code. The normal allocation of shared memory on a Mac is insufficient and this
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WSJT-X makes use of a block of memory which is shared between different parts of
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has to be increased. The com.wsjtx.sysctl.plist file is used for this purpose. You can
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the code. The normal allocation of shared memory on a Mac is insufficient and this
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use a Mac editor to examine the file. (Do not use another editor - the file
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has to be increased. The com.wsjtx.sysctl.plist file is used for this purpose. You can
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would probably be corrupted.)
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use a Mac editor to examine the file. (Do not use another editor - the file
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would probably be corrupted.)
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It is possible to run two instances of WSJT-X simultaneously. See "Section 16.2
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Frequently asked Questions" in the User Guide. If you wish to run more than two instances
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It is possible to run two instances of WSJT-X simultaneously. See "Section 16.2
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simultaneously, the shmall parameter in the com.wsjtx.sysctl.plist file needs to be modified as follows.
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Frequently asked Questions" in the User Guide. If you wish to run more than two instances
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simultaneously, the shmall parameter in the com.wsjtx.sysctl.plist file needs to be modified as follows.
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The shmall parameter determines the amount of shared memory which is allocated in 4096 byte pages
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with 50MB (52428800) required for each instance. The shmall parameter is calculated as:
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The shmall parameter determines the amount of shared memory which is allocated in 4096 byte pages
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(n * 52428800)/4096 where 'n' is the number of instances required to run simultaneously.
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with 50MB (52428800) required for each instance. The shmall parameter is calculated as:
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Replace your new version of this file in /Library/LaunchDaemons and remember to reboot your
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(n * 52428800)/4096 where 'n' is the number of instances required to run simultaneously.
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Mac afterwards.
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Replace your new version of this file in /Library/LaunchDaemons and remember to reboot your
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Mac afterwards.
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Note that the shmmax parameter remains unchanged. This is the maximum amount of shared memory that
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any one instance is allowed to request from the total shared memory allocation and should not
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Note that the shmmax parameter remains unchanged. This is the maximum amount of shared memory that
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be changed.
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any one instance is allowed to request from the total shared memory allocation and should not
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be changed.
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If two instances of WSJT-X are running, it is likely that you might need additional
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audio devices, from two rigs for example. Visit Audio MIDI Setup and create an Aggregate Device
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If two instances of WSJT-X are running, it is likely that you might need additional
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which will allow you to specify more than one interface. I recommend you consult Apple's guide
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audio devices, from two rigs for example. Visit Audio MIDI Setup and create an Aggregate Device
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on combining multiple audio interfaces which is at https://support.apple.com/en-us/HT202000.
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which will allow you to specify more than one interface. I recommend you consult Apple's guide
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on combining multiple audio interfaces which is at https://support.apple.com/en-us/HT202000.
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2. Preventing WSJT-X from being put into 'sleep' mode (App Nap).
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2. Preventing WSJT-X from being put into 'sleep' mode (App Nap).
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In normal circumstances an application which has not been directly accessed for a while can be
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subject to App Nap which means it is suspended until such time as its windows are accessed. If
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In normal circumstances an application which has not been directly accessed for a while can be
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subject to App Nap which means it is suspended until such time as its windows are accessed. If
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you find that WSJT-X seems disabled check this by opening Applications > Utilities > Activity Monitor and
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then select Energy and look at the column marked App Nap. If you see wsjtx marked "Yes" then you need
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to disable App Nap by opening a Terminal window and typing:
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defaults write NSGlobalDomain NSAppSleepDisabled -bool YES
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This will disable App Nap for all applications. If you wish to reverse this type:
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defaults delete NSGlobalDomain NSAppSleepDisabled
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