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Citrix Workspace 2002 on Mac Pro 2019 (7,1) causes loginwindow/WindowServer crash on Catalina (10.15.4)

John Devitofranceschi


I've been experiencing loginwindow/Workspace crashes on my new 2019 Mac Pro (Mac Pro 7,1 3.3GHz 12-core Intel Xeon W, 48GB DDR4 ECC RAM - 10.15.4 - 2TB SSD - AMD Radeon Pro 580X 8GB - 27" LG Ultrafine 5K Display) when I wake the display.  This happens reliably when I'm running Citrix Workspace sessions.


The crash report says this, always with the same stack trace on the crashed thread:

Thread 13 Crashed:
0   libsystem_platform.dylib          0x00007fff714549c6 _platform_memmove$VARIANT$Haswell + 198
1   com.apple.framework.IOKit         0x00007fff3a0b8ff7 _IOHIDValueCopyToElementValuePtr + 91
2   com.apple.iokit.IOHIDLib          0x0000000110a8b4b4 0x110a7e000 + 54452
3   com.apple.iokit.IOHIDLib          0x0000000110a7f9a2 0x110a7e000 + 6562
4   com.apple.DSExternalDisplay       0x00007fff511dcc1b __DSBrightnessExternalSetBrightness_block_invoke_2 + 785
5   libdispatch.dylib                 0x00007fff712046c4 _dispatch_call_block_and_release + 12
6   libdispatch.dylib                 0x00007fff71205658 _dispatch_client_callout + 8
7   libdispatch.dylib                 0x00007fff7120ac44 _dispatch_lane_serial_drain + 597
8   libdispatch.dylib                 0x00007fff7120b5d6 _dispatch_lane_invoke + 363
9   libdispatch.dylib                 0x00007fff71214c09 _dispatch_workloop_worker_thread + 596
10  libsystem_pthread.dylib           0x00007fff7145fa3d _pthread_wqthread + 290
11  libsystem_pthread.dylib           0x00007fff7145eb77 start_wqthread + 15

Thread 14:
0   libsystem_pthread.dylib           0x00007fff7145eb68 start_wqthread + 0

Thread 13 crashed with X86 Thread State (64-bit):
  rax: 0x0000000110d0c08c  rbx: 0x00007fc57fe05a18  rcx: 0x0000000000000070  rdx: 0x0000000000000004
  rdi: 0x0000000110d0c08c  rsi: 0x00007fc57fe05a18  rbp: 0x00007000047d7620  rsp: 0x00007000047d7620
   r8: 0x0000000000000000   r9: 0x000000000000028f  r10: 0x0000000110a95d58  r11: 0xffff803b90f06674
  r12: 0x0000000110d0c08c  r13: 0x0000000000000000  r14: 0x0000000110d0c078  r15: 0x0000000000000004
  rip: 0x00007fff714549c6  rfl: 0x0000000000010246  cr2: 0x0000000110d0c08c
Logical CPU:     14
Error Code:      0x00000007 (invalid protections for user data write)
Trap Number:     14


The result of this error is that I'm booted back to the login prompt and I lose my session.  


Anyone seen this before?  Any advice to help me track down and fix the cause?  I've already disabled SIP and I've tried it when booting to 'safe mode' with no change in the behavior.


This only happens when I'm running Citrix Workspace 2002 + the HDX Realtime Media Engine 2.9 (latest versions)






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