Geekbench GUI failed to run, Geekbench avx2 and non-avx2 command line also failed to run

[LongQT-sea]

Host CPU: i9 9900
Guest macOS 14.8.1
Geekbench 6.5

longqt@mac-14 ~ % sudo "/Applications/Geekbench 6.app/Contents/Resources/geekbench_avx2"
Password:
Geekbench 6.5.0 : https://www.geekbench.com/

Geekbench 6 requires an active internet connection and automatically uploads
benchmark results to the Geekbench Browser.

Upgrade to Geekbench 6 Pro to enable offline use and unlock other features:

  https://store.primatelabs.com/v6

Enter your Geekbench 6 Pro license using the following command line:

  /Applications/Geekbench 6.app/Contents/Resources/geekbench_avx2 --unlock
<email> <key>

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString bytes]: unrecognized selector sent to instance 0x600001246460'
*** First throw call stack:
(
        0   CoreFoundation                      0x00007ff80c702cb6 __exceptionPreprocess + 242
        1   libobjc.A.dylib                     0x00007ff80c1f19dd objc_exception_throw + 48
        2   CoreFoundation                      0x00007ff80c7a8404 -[NSObject(NSObject) __retain_OA] + 0
        3   CoreFoundation                      0x00007ff80c670293 ___forwarding___ + 1379
        4   CoreFoundation                      0x00007ff80c66fca8 _CF_forwarding_prep_0 + 120
        5   geekbench_avx2                      0x000000010f5f9170 _ZN9OSXSystem10gpu_modelsEv + 336
        6   geekbench_avx2                      0x000000010f5c64ec _ZN12_GLOBAL__N_124initialize_sysinfo_cacheEv + 16636
        7   geekbench_avx2                      0x000000010f5c22ef _Z13sysinfo_value16SystemMetricTypeR12SystemMetric + 31
        8   geekbench_avx2                      0x000000010f584dd7 _ZN17SystemInformation6gatherEP8Document + 231
        9   geekbench_avx2                      0x000000010f486cf7 _ZN26GeekbenchSystemInformation6gatherEP17BenchmarkDocument + 87
        10  geekbench_avx2                      0x000000010f34d398 _ZN15BenchmarkDriver14run_benchmarksERKNSt3__13setI11SectionTypeNS0_4lessIS2_EENS0_9allocatorIS2_EEEERKNS1_I12WorkloadTypeNS3_ISA_EENS5_ISA_EEEERK15WorkloadOptionsP17BenchmarkDocument + 392
        11  geekbench_avx2                      0x000000010f34bb2f _ZN15BenchmarkDriver17run_cpu_benchmarkEPK13DriverOptions + 239
        12  geekbench_avx2                      0x000000010f3467c1 _ZN12_GLOBAL__N_113do_benchmarksER5Flags + 9585
        13  geekbench_avx2                      0x000000010f341c01 _Z12console_mainiPPc + 6129
        14  geekbench_avx2                      0x000000010f348ec3 main + 19
        15  dyld                                0x00007ff80c226345 start + 1909
)
libc++abi: terminating due to uncaught exception of type NSException
zsh: abort      sudo "/Applications/Geekbench 6.app/Contents/Resources/geekbench_avx2"
longqt@mac-14 ~ % sudo "/Applications/Geekbench 6.app/Contents/Resources/geekbench_x86_64"
Geekbench 6.5.0 : https://www.geekbench.com/

Geekbench 6 requires an active internet connection and automatically uploads
benchmark results to the Geekbench Browser.

Upgrade to Geekbench 6 Pro to enable offline use and unlock other features:

  https://store.primatelabs.com/v6

Enter your Geekbench 6 Pro license using the following command line:

  /Applications/Geekbench 6.app/Contents/Resources/geekbench_x86_64 --unlock
<email> <key>

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString bytes]: unrecognized selector sent to instance 0x60000240d0b0'
*** First throw call stack:
(
        0   CoreFoundation                      0x00007ff80c702cb6 __exceptionPreprocess + 242
        1   libobjc.A.dylib                     0x00007ff80c1f19dd objc_exception_throw + 48
        2   CoreFoundation                      0x00007ff80c7a8404 -[NSObject(NSObject) __retain_OA] + 0
        3   CoreFoundation                      0x00007ff80c670293 ___forwarding___ + 1379
        4   CoreFoundation                      0x00007ff80c66fca8 _CF_forwarding_prep_0 + 120
        5   geekbench_x86_64                    0x000000010a3f7400 _ZN9OSXSystem10gpu_modelsEv + 320
        6   geekbench_x86_64                    0x000000010a3c0f34 _ZN12_GLOBAL__N_124initialize_sysinfo_cacheEv + 16340
        7   geekbench_x86_64                    0x000000010a3bce5f _Z13sysinfo_value16SystemMetricTypeR12SystemMetric + 31
        8   geekbench_x86_64                    0x000000010a380809 _ZN17SystemInformation6gatherEP8Document + 233
        9   geekbench_x86_64                    0x000000010a2856c7 _ZN26GeekbenchSystemInformation6gatherEP17BenchmarkDocument + 87
        10  geekbench_x86_64                    0x000000010a143f28 _ZN15BenchmarkDriver14run_benchmarksERKNSt3__13setI11SectionTypeNS0_4lessIS2_EENS0_9allocatorIS2_EEEERKNS1_I12WorkloadTypeNS3_ISA_EENS5_ISA_EEEERK15WorkloadOptionsP17BenchmarkDocument + 392
        11  geekbench_x86_64                    0x000000010a1426dd _ZN15BenchmarkDriver17run_cpu_benchmarkEPK13DriverOptions + 237
        12  geekbench_x86_64                    0x000000010a13d360 _ZN12_GLOBAL__N_113do_benchmarksER5Flags + 9552
        13  geekbench_x86_64                    0x000000010a1387e7 _Z12console_mainiPPc + 6071
        14  geekbench_x86_64                    0x000000010a13fa23 main + 19
        15  dyld                                0x00007ff80c226345 start + 1909
)
libc++abi: terminating due to uncaught exception of type NSException
zsh: abort      sudo "/Applications/Geekbench 6.app/Contents/Resources/geekbench_x86_64"

[Qonfused]

It's crashing while trying to enumerate the available GPUs on the system:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString bytes]: unrecognized selector sent to instance 0x600001246460'
...
// Both the AVX2 and x86_64 binary call OSXSystem::gpu_models()
5 geekbench_avx2 0x000000010f5f9170 _ZN9OSXSystem10gpu_modelsEv + 336
5 geekbench_x86_64 0x000000010a3f7400 _ZN9OSXSystem10gpu_modelsEv + 320

It looks like Geekbench is expecting a NSData/CFData (bytes) value instead of a NSString/CFString (string) from one of the fields in MacHyperVFramebuffer's device IORegistry. There is a convention in Apple's IOKit/IOKitKeys.h for reporting the GPU's model name as a bytes field (with ASCII values) instead of a string field, which is probably the issue here.

I figure they probably reverse-engineered Apple's "standard" IORegistry device structures to probe as a fallback (when there's no GPU acceleration, i.e. no Apple graphics stack loaded) and they don't guard against any type usage that doesn't follow Apple's convention from real macs. In that case it's a relatively simple fix in HyperVGraphicsFramebuffer::start:

HyperVGraphicsFramebuffer.cpp#L56-L59
  56 |  //
  57 |  // Add model to PCI device.
  58 |  //
- 59 |  pciDevice->setProperty("model", "Hyper-V Graphics");
+ 59 |  // Apple convention for the "model" property (kIOPropertyModelKey) is OSData
+ 60 |  // containing an ASCII, typically NUL-terminated, string.
+ 61 |  //
+ 62 |  static const char kHvGfxModel[] = "Hyper-V Graphics";
+ 63 |  if (OSData *modelData = OSData::withBytes(kHvGfxModel, sizeof(kHvGfxModel))) {
+ 64 |    pciDevice->setProperty("model", modelData);
+ 65 |    modelData->release();
+ 67 |  }

I'll have to run this through a debugger to verify, but it appears to be a relatively straightforward issue.

[LongQT-sea]

Thank you, removing the HyperVGraphicsFramebuffer kext and rebooting does indeed fix the Geekbench crash.