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Updated macOS ReadMe.txt with extra instructions for M1 Macs, tnx to John, G4KLA

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Bill Somerville 2020-11-26 12:31:00 +00:00
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Darwin/ReadMe.txt
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@ -1,15 +1,33 @@
Notes on WSJT-X Installation for Mac OS X
-----------------------------------------
Important: If you are using the new Mac with the M1 chip then please read
the section marked: BEGIN M1. Otherwise BEGIN INTEL applies.
If you have already downloaded a previous version of WSJT-X then I suggest
you change the name in the Applications folder from WSJT-X to WSJT-X_previous
before proceeding.
If you have installed a previous version of WSJT-X before, then there is no
need to change anything on your system so proceed to NEXT. If you upgrade macOS
it is possible that you might need to re-install the sysctl.conf file.
I recommend that you follow the installation instructions especially if you
are moving from v2.2 to v2.3 of WSJT-X or you have upgraded macOS.
BEGIN:
BEGIN M1:
Double-click on the wsjtx-...-Darwin.dmg file you have downloaded from K1JT's web-site.
Now open a Terminal window by going to Applications->Utilities and clicking on Terminal.
There are two system variables that must be set manually since the M1 Macs do not recognise
automatic parameter settings by means of the sysctl.conf file present in the download.
Type these commands - you will be asked for your password which will not be echoed:
sudo sysctl -w kern.sysv.shmmax=104857600
sudo sysctl -w kern.sysv.shmall=25600
It is important to note that these parameter settings will not survive a reboot. If you
need to reboot your Mac, then these commands must be re-entered. Now proceed to NEXT.
BEGIN INTEL:
Double-click on the wsjtx-...-Darwin.dmg file you have downloaded from K1JT's web-site.
@ -78,16 +96,20 @@ Please email me if you have problems.
--- John G4KLA (g4kla@rmnjmn.co.uk)
Addendum: Information about sysctl.conf and multiple instances of wsjt-x.
Addendum: Information about sysctl.conf and multiple instances of WSJT-X.
WSJT-X makes use of a block of memory which is shared between different parts of
the code. The normal allocation of shared memory on a Mac is insufficient and this
has to be increased. The sysctl.conf file is used for this purpose. You can
use a Mac editor to examine sysctl.conf. (Do not use another editor - the file
would be probably be corrupted.)
would probably be corrupted.)
It is possible to run two instances of WSJT-X simultaneously. See "Section 16.2
Frequently asked Questions" in the User Guide. If you wish to run more than two instances
simutaneously, the sysctl.conf file needs to be modified. Please email me with your
simultaneously, the sysctl.conf file needs to be modified. Please email me with your
requirements and I will provide a replacement sysctl.conf to suit.
If two instances of WSJT-X are running, it is likely that you might need additional
audio devices, from two rigs for example. Visit Audio MIDI Setup and create an Aggregate Device
which will allow you to specific more than one interface. I recommend you consult Apple's guide
on combining multiple audio interfaces which is at https://support.apple.com/en-us/HT202000.