Hi Bill, Further to the WSJT-X + Big Sur + M1 problem, three conclusions have been reached following tests with my correspondent:
1. The M1 page size is 4k and not 16k 2. It seems that the M1 version of Big Sur does not get the shared memory information from /etc/sysctl.conf 3. If kern.sysv.shmmax and kern.sysv.shmall are directly written to via terminal commands (104857600 and 25600 respectively) then WSJT-X loads and runs. The snag here is that these kern.sysv values do not survive a reboot - although this has to be tested. Next step is to find out how to set the shared memory configuration in a permanent way. Tomorrow’s job… — John G4KLA
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