I've installed the Big Sur Beta on a development VM (Parallels on a 10.15.5 host). Initially I upgraded from a Mojave base line. The installation all goes fine and I finally get to the log-in screen of Big Sur. I enter my password and things start whirring but after a minute or so the screen goes black then after another minute or so I'm back at the log in screen again. I've done the oblatory, wait awhile, retries and reboots but still the same result. I've also tried increasing disk size and number of CPU cores in the VM. I repeated the process starting with a Catalina baseline and have finished up with exactly the same result. I have a couple of thoughts. First is this a known problem and secondly is this due to testing on a VM rather than computer? I've not had this issue previously and run VM versions of macOS back to 10.9 for testing.

I have an issue with XCode. It crashes as soon as I try to launch it with the error Failed to create CSSymbolicatorRef - corpse still valid ¯_(ツ)_/¯. I had a disk failure a short time ago and reinstalled the OS using recovery and restored from backup. XCode failed right after that. Subsequently I deleted XCode and re-installed, deleted all the caches but still crashing. In desperation I reformatted the disk and installed XCode on a new install of macOS. Still crashing. I've reset NVRAM and SVC, still crashing... Any ideas? I'm completely stumped. Translated Report (Full Report Below) Incident Identifier: 30AF29F7-F1E4-48A8-A786-A6FD2CB54165 CrashReporter Key: DFFA8C60-172A-8080-D930-85E5F467FDF7 Hardware Model: MacBookPro13,3 Process: Xcode [34953] Path: /Applications/Xcode.app/Contents/MacOS/Xcode Identifier: com.apple.dt.Xcode Version: 13.4.1 (20504) Code Type: X86-64 (Native) Role: Default Parent Process: launchd [1] Coalition: com.apple.dt.Xcode [20486] Date/Time: 2023-12-18 11:40:06.7925 +0000 Launch Time: 2023-12-18 11:40:06.6897 +0000 OS Version: macOS 12.7.2 (21G1974) Release Type: User Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Highlighted by Thread: 0 Backtrace not available No thread state (register information) available Binary Images: Binary images description not available Error Formulating Crash Report: dyld_process_info_create failed with 5 Failed to create CSSymbolicatorRef - corpse still valid ¯_(ツ)/¯ thread_get_state(PAGEIN) returned 0x10000003: (ipc/send) invalid destination port thread_get_state(EXCEPTION) returned 0x10000003: (ipc/send) invalid destination port thread_get_state(FLAVOR) returned 0x10000003: (ipc/send) invalid destination port EOF Full Report {"app_name":"Xcode","timestamp":"2023-12-18 11:40:06.00 +0000","app_version":"13.4.1","slice_uuid":"92564dff-7804-3b98-9e11-580d10da8034","build_version":"20504","platform":0,"bundleID":"com.apple.dt.Xcode","share_with_app_devs":0,"is_first_party":0,"bug_type":"309","os_version":"macOS 12.7.2 (21G1974)","incident_id":"30AF29F7-F1E4-48A8-A786-A6FD2CB54165","name":"Xcode"} { "uptime" : 110000, "procLaunch" : "2023-12-18 11:40:06.6897 +0000", "procRole" : "Default", "version" : 2, "userID" : 502, "deployVersion" : 210, "modelCode" : "MacBookPro13,3", "procStartAbsTime" : 118102055383117, "coalitionID" : 20486, "osVersion" : { "train" : "macOS 12.7.2", "build" : "21G1974", "releaseType" : "User" }, "captureTime" : "2023-12-18 11:40:06.7925 +0000", "incident" : "30AF29F7-F1E4-48A8-A786-A6FD2CB54165", "bug_type" : "309", "pid" : 34953, "procExitAbsTime" : 118102157623686, "cpuType" : "X86-64", "procName" : "Xcode", "procPath" : "/Applications/Xcode.app/Contents/MacOS/Xcode", "bundleInfo" : {"CFBundleShortVersionString":"13.4.1","CFBundleVersion":"20504","CFBundleIdentifier":"com.apple.dt.Xcode"}, "buildInfo" : {"ProjectName":"IDEFrameworks","SourceVersion":"20504000000000000","ProductBuildVersion":"13F100","BuildVersion":"2"}, "storeInfo" : {"deviceIdentifierForVendor":"B72EFCD3-5F6C-523A-9C18-9911ABE8748F","thirdParty":true}, "parentProc" : "launchd", "parentPid" : 1, "coalitionName" : "com.apple.dt.Xcode", "crashReporterKey" : "DFFA8C60-172A-8080-D930-85E5F467FDF7", "wakeTime" : 1699, "bridgeVersion" : {"build":"14Y910","train":"3.0"}, "sleepWakeUUID" : "1CE55AF8-D435-40BF-976C-CF50FF1D79F5", "sip" : "enabled", "isCorpse" : 1, "exception" : {"codes":"0x0000000000000000, 0x0000000000000000","rawCodes":[0,0],"type":"EXC_CRASH","signal":"SIGABRT"}, "extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0}, "sharedCache" : { "base" : 140703546314752, "size" : 19331678208, "uuid" : "8ec191b8-2f89-31dc-ab61-d4a7547258ef" }, "legacyInfo" : { "threadHighlighted" : 0 }, "trialInfo" : { "rollouts" : [ { "rolloutId" : "607844aa04477260f58a8077", "factorPackIds" : { "SIRI_MORPHUN_ASSETS" : "6103050cbfe6dc472e1c982a" }, "deploymentId" : 240000066 }, { "rolloutId" : "5fc94383418129005b4e9ae0", "factorPackIds" : { }, "deploymentId" : 240000614 } ], "experiments" : [ ] }, "reportNotes" : [ "dyld_process_info_create failed with 5", "Failed to create CSSymbolicatorRef - corpse still valid ¯\(ツ)_/¯", "thread_get_state(PAGEIN) returned 0x10000003: (ipc/send) invalid destination port", "thread_get_state(EXCEPTION) returned 0x10000003: (ipc/send) invalid destination port", "thread_get_state(FLAVOR) returned 0x10000003: (ipc/send) invalid destination port" ] } Model: MacBookPro13,3, BootROM 522.0.0.0.0, 4 processors, Quad-Core Intel Core i7, 2.9 GHz, 16 GB, SMC 2.38f12 Graphics: Intel HD Graphics 530, Intel HD Graphics 530, Built-In Graphics: Radeon Pro 460, AMD Radeon Pro 460, PCIe, 4 GB Display: Color LCD, 2880 x 1800 Retina, Main, MirrorOff, Online Display: Thunderbolt Display, 2560 x 1440 (QHD/WQHD - Wide Quad High Definition), MirrorOff, Online Memory Module: BANK 0/DIMM0, 8 GB, LPDDR3, 2133 MHz, 0x802C, 0x4D5435324C31473332443450472D30393320 Memory Module: BANK 1/DIMM0, 8 GB, LPDDR3, 2133 MHz, 0x802C, 0x4D5435324C31473332443450472D30393320 AirPort: spairport_wireless_card_type_wifi (0x14E4, 0x15A), Broadcom BCM43xx 1.0 (7.77.111.1 AirPortDriverBrcmNIC-1710.4) AirPort: Bluetooth: Version (null), 0 services, 0 devices, 0 incoming serial ports Network Service: Ethernet Adapter (en7), Ethernet, en7 Network Service: Wi-Fi, AirPort, en0 PCI Card: Apple 57761-B0, Ethernet Controller, Thunderbolt@194,0,0 PCI Card: pci11c1,5901, IEEE 1394 Open HCI, Thunderbolt@193,0,0 PCI Card: pci12d8,400e, USB Open Host Controller, Thunderbolt@197,0,0 PCI Card: pci12d8,400e, USB Open Host Controller, Thunderbolt@197,0,1 PCI Card: pci12d8,400f, USB Enhanced Host Controller, Thunderbolt@197,0,2 USB Device: USB20Bus USB Device: hub_device USB Device: Apple Thunderbolt Display USB Device: FaceTime HD Camera (Display) USB Device: Display Audio USB Device: USB30Bus USB Device: Apple T1 Controller USB Device: Rugged USB-C Thunderbolt Bus: MacBook Pro, Apple Inc., 41.5 Thunderbolt Bus: MacBook Pro, Apple Inc., 41.5 Thunderbolt Device: Thunderbolt Display, Apple Inc., 1, 26.2