Hi Bill, A problem reported to me that 2.2.0-rc1 will not load on MacOS 10.12.6. I confirm that there is a problem with QtGui which was built for Mac OS X 10.13. This error is from my version of 10.12
— John G4KLA Process: wsjtx [42790] Path: /Users/USER/Desktop/wsjtx.app/Contents/MacOS/wsjtx Identifier: org.k1jt.wsjtx Version: v2.2.0-rc1 (2.2.0-rc1) Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: wsjtx [42790] User ID: 503 Date/Time: 2020-05-13 09:57:26.198 +0100 OS Version: Mac OS X 10.12.6 (16G2136) Report Version: 12 Anonymous UUID: 1E85A0CB-85E7-9ED5-46A0-93C9B94A39E1 Sleep/Wake UUID: EE5721E5-2E3D-44B1-AAB5-348624FF5AFF Time Awake Since Boot: 5600000 seconds Time Since Wake: 170000 seconds System Integrity Protection: disabled Crashed Thread: 0 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Reason: DYLD, [0x4] Symbol missing Application Specific Information: dyld: launch, loading dependent libraries Dyld Error Message: Symbol not found: _OBJC_CLASS_$_MTLCaptureManager Referenced from: /Users/USER/Desktop/wsjtx.app/Contents/MacOS/../Frameworks/QtGui.framework/Versions/5/QtGui (which was built for Mac OS X 10.13) Expected in: /System/Library/Frameworks/Metal.framework/Versions/A/Metal in /Users/USER/Desktop/wsjtx.app/Contents/MacOS/../Frameworks/QtGui.framework/Versions/5/QtGui
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