Symptoms: after updating to Security Update 2020-005 on macOS 10.14 Mojave:
Swift-built screensavers no longer funcion
You will get a blank screen when the screensaver activates the first time.
After the first time, the screensaver will revert to the default macOS screensaver
Attempts to view the screensaver in System Preferences / Desktop & Screen Saver will give a blank page
Crash logs indicate that the com.apple.preference.desktopscreeneffect.screeneffects.remoteservice process is crashing (see typical crash log below)
Regression Testing:
This happens on macOS 10.14.6 with Security Update 2020-005. We do not know if it affects other versions of macOS
This affects personal or commercial screensavers built using iScreensaver ( iScreensaver.com ) but also seems to affect other screensavers such as the swift Clock.Saver found here: https://github.com/soffes/Clock.saver
Typical Crash Log:
Code Block Process: com.apple.preference.desktopscreeneffect.screeneffects.remoteservice [962] Path: /System/Library/PreferencePanes/DesktopScreenEffectsPref.prefPane/Contents/Resources/ScreenEffects.prefPane/Contents/XPCServices/com.apple.preference.desktopscreeneffect.screeneffects.remoteservice.xpc/Contents/MacOS/com.apple.preference.desktopscreeneffect.screeneffects.remoteservice Identifier: com.apple.preference.desktopscreeneffect.screeneffects.remoteservice Version: 1.0 (1) Build Info: DesktopScreenEffectsPref-229003000000000~20 Code Type: X86-64 (Native) Parent Process: ??? [1] Responsible: System Preferences [955] User ID: 507 Date/Time: 2020-09-26 08:19:16.779 -0700 OS Version: Mac OS X 10.14.6 (18G6032) Report Version: 12 Anonymous UUID: DA9B5F71-78EB-7DD2-F219-AF6A3A811FC1 Time Awake Since Boot: 1300 seconds System Integrity Protection: enabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_PROTECTION_FAILURE at 0x00007ffeef184ff8 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [962] VM Regions Near 0x7ffeef184ff8: MALLOC_SMALL 00007fc640000000-00007fc640800000 [ 8192K] rw-/rwx SM=PRV --> STACK GUARD 00007ffeeb985000-00007ffeef185000 [ 56.0M] ---/rwx SM=NUL stack guard for thread 0 Stack 00007ffeef185000-00007ffeef985000 [ 8192K] rw-/rwx SM=SHM thread 0 Application Specific Signatures: Clock Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libsystem_malloc.dylib 0x00007fff79a0fc95 malloc_zone_malloc + 99 1 libsystem_malloc.dylib 0x00007fff79a0fc99 malloc_zone_malloc + 103 2 libsystem_malloc.dylib 0x00007fff79a0fc99 malloc_zone_malloc + 103 3 libsystem_malloc.dylib 0x00007fff79a0fc99 malloc_zone_malloc + 103 4 libsystem_malloc.dylib 0x00007fff79a0fc99 malloc_zone_malloc + 103 [... this stack trace repeats for 511 entries ...]
