Just give you an update here, tried 11.5 beta 2, none bugs are fixed. M1 still can't use with external displays without kernel panics, disconnects etc. I have to work... Just tried to send 5 mails via Mail, just simple text mails, but then Mail is crashing: Crashed Thread: 13 Dispatch queue: com.apple.email.EDPETInteractionEventLog.workQueue Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Application Specific Information: dyld3 mode *** Terminating app due to uncaught exception 'NSGenericException', reason: '*** Collection <__NSArrayM: 0x6000007b5e60> was mutated while being enumerated.' terminating with uncaught exception of type NSException abort() called Application Specific Backtrace 1: 0 CoreFoundation 0x00007fff2049283b __exceptionPreprocess + 242 1 libobjc.A.dylib 0x00007fff201cad92 objc_exception_throw + 48 2 CoreFoundation 0x00007fff2050e933 __NSFastEnumerationMutationHandler + 151 3 CoreFoundation 0x00007fff203d5d06 -[NSArray containsObject:] + 206 4 MailCore 0x00007fff5195dfbc -[MCMutableMessageHeaders _firstAddressForKey:sender:] + 107 5 MailCore 0x00007fff519574a3 -[MCMessageHeaders firstAddressForKey:] + 113 6 MailCore 0x00007fff5194fc2f -[MCMessage loadCachedHeaderValuesFromHeaders:type:] + 336 7 MailCore 0x00007fff5194f5f3 -[MCMessage sender] + 139 8 MailCore 0x00007fff5195f5f4 -[MCMessage senders] + 38 9 EmailDaemon 0x00007fff4b229fb8 -[EDPETInteractionEventLog hashedMessageHeadersForMessage:] + 201 10 EmailDaemon 0x00007fff4b2c2422 -[EDPBInteractionEventMessageSent(EDPBGeneratedExtensions) withHasher:setDataFromMessage:account:] + 140 11 CoreFoundation 0x00007fff203fbd7c __invoking___ + 140 12 CoreFoundation 0x00007fff203fbc1d -[NSInvocation invoke] + 305 13 CoreFoundation 0x00007fff2042b775 -[NSInvocation invokeWithTarget:] + 70 Might be, that Mail isn't any longer usable to just send mails out. Started the nice Feedback Assistant again to just report it, but then, the apsd crash are coming up again and the display starts to flickering: Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000018 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [112] VM Regions Near 0x18: --> __TEXT 106511000-106631000 [ 1152K] r-x/r-x SM=COW /System/Library/PrivateFrameworks/ApplePushService.framework/apsd Application Specific Information: dyld3 mode Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 apsd 0x0000000106554247 0x106511000 + 275015 1 apsd 0x0000000106555015 0x106511000 + 278549 2 apsd 0x00000001065767bf 0x106511000 + 415679 3 apsd 0x000000010657f0bb 0x106511000 + 450747 4 apsd 0x000000010657edc2 0x106511000 + 449986 5 apsd 0x0000000106583e31 0x106511000 + 470577 6 apsd 0x0000000106577e23 0x106511000 + 421411 7 libxpc.dylib 0x00007fff20065c24 _xpc_connection_call_event_handler + 56 8 libxpc.dylib 0x00007fff20064a9b _xpc_connection_mach_event + 938 9 libdispatch.dylib 0x00007fff201758a6 _dispatch_client_callout4 + 9 10 libdispatch.dylib 0x00007fff2018caa0 _dispatch_mach_msg_invoke + 444 11 libdispatch.dylib 0x00007fff2017b493 _dispatch_lane_serial_drain + 263 12 libdispatch.dylib 0x00007fff2018d5e2 _dispatch_mach_invoke + 484 13 libdispatch.dylib 0x00007fff20181a08 _dispatch_main_queue_callback_4CF + 613 14 com.apple.CoreFoundation 0x00007fff204555a8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9 15 com.apple.CoreFoundation 0x00007fff204177a2 __CFRunLoopRun + 2755 16 com.apple.CoreFoundation 0x00007fff2041661c CFRunLoopRunSpecific + 563 17 com.apple.Foundation 0x00007fff211a5607 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 18 com.apple.Foundation 0x00007fff212334d1 -[NSRunLoop(NSRunLoop) run] + 76 19 apsd 0x00000001065abb00 0x106511000 + 633600 20 libdyld.dylib 0x00007fff2033af5d start + 1

Have you tried freeing up more space on the SSD?

still nothing fixed with 11.5 beta 2, whether Apple simply has no more priority on it or they can just add new bugs and not fix any more because missing knowledge on this topic.

Let's attach another list here: First, the Console App seems to use the wrong field for the sorting which is a joke: After fresh installation, four old friends appears in the crash log again. First of all, cloudd is crashing in sleeping mode every hour or so with the same issue on M1 (doesn't occur on Intel): Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Application Specific Information: dyld3 mode *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'We don't have a database queue yet' terminating with uncaught exception of type NSException abort() called Next is com.apple.Safari.History, crashing daily on both Intel and M1, might be an concurrency issue: Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [2808] VM Regions Near 0: --> __TEXT 102298000-10229c000 [ 16K] r-x/r-x SM=COW /System/Library/PrivateFrameworks/SafariShared.framework/Versions/A/XPCServices/com.apple.Safari.History.xpc/Contents/MacOS/com.apple.Safari.History Thread 0:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x000000019da8cdd4 mach_msg_trap + 8 1 libsystem_kernel.dylib 0x000000019da8d184 mach_msg + 76 2 com.apple.CoreFoundation 0x000000019dbc6d50 __CFRunLoopServiceMachPort + 372 3 com.apple.CoreFoundation 0x000000019dbc521c __CFRunLoopRun + 1212 4 com.apple.CoreFoundation 0x000000019dbc45e8 CFRunLoopRunSpecific + 600 5 com.apple.Foundation 0x000000019e96d638 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 232 6 com.apple.Foundation 0x000000019e9ffb20 -[NSRunLoop(NSRunLoop) run] + 92 7 libxpc.dylib 0x000000019d83b768 _xpc_objc_main + 900 8 libxpc.dylib 0x000000019d83af94 xpc_main + 132 9 com.apple.Foundation 0x000000019e98e468 -[NSXPCListener resume] + 340 10 com.apple.Safari.Shared 0x00000001b9fa6494 WBSHistoryServiceMain + 412 11 libdyld.dylib 0x000000019dae5450 start + 4 Mainly when using the Feedback Assistant apsd is crashing, but it also happens from time to time without touching Feedback Assistant. Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [263] VM Regions Near 0x18: --> __TEXT 100328000-100424000 [ 1008K] r-x/r-x SM=COW /System/Library/PrivateFrameworks/ApplePushService.framework/apsd Application Specific Information: dyld3 mode Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 apsd 0x000000010036d8d8 0x100328000 + 284888 1 apsd 0x000000010036d8c0 0x100328000 + 284864 2 apsd 0x000000010036e474 0x100328000 + 287860 3 apsd 0x000000010038f148 0x100328000 + 422216 4 apsd 0x00000001003973a8 0x100328000 + 455592 5 apsd 0x00000001003970fc 0x100328000 + 454908 6 apsd 0x000000010039b3fc 0x100328000 + 472060 7 apsd 0x00000001003908a0 0x100328000 + 428192 Let's go over to some kernel panics: panic(cpu 0 caller 0xfffffe0011e3d798): "dart-dispext0 (0xfffffe2333948000): SMMU(SMMU) error: SID 0 PTE invalid exception on read with DVA 0x12800 (TTBR 0 SEG 0 PTE 0x4) ERROR_STATUS 0x80000004 TIME 0x1b6fc3ba3222 TTE 0 AXI_ID 0)" Debugger message: panic Memory ID: 0xff OS release type: User OS version: 20F71 Kernel version: Darwin Kernel Version 20.5.0: Sat May 8 05:10:31 PDT 2021; root:xnu-7195.121.3~9/RELEASE_ARM64_T8101 Fileset Kernelcache UUID: FB10CC0AB8BAC020BC47A50D64476F11 Kernel UUID: 07259C53-9EF7-32FF-821D-8F28A5985DFA iBoot version: iBoot-6723.120.36 secure boot?: YES Paniclog version: 13 KernelCache slide: 0x0000000008c64000 KernelCache base: 0xfffffe000fc68000 Kernel slide: 0x00000000097ac000 Kernel text base: 0xfffffe00107b0000 Kernel text exec base: 0xfffffe001087c000 mach_absolute_time: 0xa89209f0fc I just started Slack as everyday last time when this one occurs. Let's go back to external Display support, since 11.3 there is a new bug with HDR content on external displays, which also affects play videos via Photos made by the iPhone, it renders a broken white window: Let's go ahead to another kernel panic which happens daily: panic(cpu 2 caller 0xffffff801de9f846): [vm objects]: element modified after free (off:208, val:0x0000000000000010, sz:256, ptr:0xffffff804ee92900, prot:zero) 208: 0x0000000000000010 Backtrace (CPU 2), Frame : Return Address 0xffffffb0d1aab330 : 0xffffff801d68e0dd 0xffffffb0d1aab380 : 0xffffff801d7d4f33 0xffffffb0d1aab3c0 : 0xffffff801d7c552a 0xffffffb0d1aab410 : 0xffffff801d632a2f 0xffffffb0d1aab430 : 0xffffff801d68d8fd 0xffffffb0d1aab550 : 0xffffff801d68dbf3 0xffffffb0d1aab5c0 : 0xffffff801de9d81a 0xffffffb0d1aab630 : 0xffffff801de9f846 0xffffffb0d1aabab0 : 0xffffff801d6ecad6 0xffffffb0d1aabb20 : 0xffffff801d7476c3 0xffffffb0d1aabb50 : 0xffffff801d7372ed 0xffffffb0d1aabc90 : 0xffffff801d724d8c 0xffffffb0d1aabf00 : 0xffffff801d7c5b40 0xffffffb0d1aabfa0 : 0xffffff801d63291f Often the system does not switch to dark mode or back, also normal by now. Simply everything is broken. Or the dock hangs along with the tooltip. Also a bug that has been around since the Big Sur betas and is still in 11.5 beta 1. Let's go to the weather App on iPadOS and macOS: the link is broken for me. Also not fixed in 11.5 Beta 1. I can't use my Intel 2018 MacBook Pro 13" either I can't install it without tricks and hacks because of "An error occurred loading the update.". Let's go back to newest Apple M1 hardware and external display support, see some new green pixels from time to time. Uh, AirPods are disconnecting all the time, when being in a pairing session, Bluetooth also doesn't work. And then in the middle of the day, WLAN stopped working. Had to reboot again. Oh, external display doesn't work then. Another kernel panic happens. Good night. Waiting for the next macOS release with hope, but after downloading 4 GB and installing it, seems nothing was fixed. Just a little daily journal now using Apple Hardware and Software.

Apple obviously doesn't fix bugs anymore but introduces new ones (like HDR video playback shows white windows on external displays). And doesn't care about it. The devices are obviously not meant to be used anymore, WLAN, Bluetooth, keyboard, screen, these are all things that should better not be used. Just like the sleep mode. The software is too unstable, so that there are constantly problems, errors up to daily multiple kernel panics. And instead of fixing them or at least transparently telling you that they are working on it, they just recommend you to buy new hardware or waste your life to reinstall broken software, which only frustrates you even more, because it doesn't solve any bug in Apple's software.

Still not fixed with 11.4.

Still not able to just start internet recovery with 11.3 and perform a reinstall. Same issue.

I found a weird solution: create a "Mac Deploy Stick" including latest version of Big Sur and enable erase the drive using the stick. But it's still not fixed on Apple's site, after using the stick to reinstall Big Sur, everything is fine, so I think it must be an issue in the Big Sur Installer. And I was able to install previous version of macOS which was also running.

E.g. Kernel Panics regarding shutting down the Mac, it never works for me without a kernel panic (which of course leads to a reboot instead of shutdown). Can reproduce this KP on three different machines, directly after erasing them and install latest Big Sur version. Occurs on Intel and M1 machines. Opened a ticket via Feedback Assistant and via Support, nothing happens. Found other people which reported exactly the same issue. This error occurs since Big Sur Beta 3 last year. panic(cpu 2 caller 0xfffffe00266b5e90): watchdog timeout: no checkins from watchdogd in 303 seconds (152 totalcheckins since monitoring last enabled), shutdown in progress Debugger message: panic Memory ID: 0xff OS release type: User OS version: 20D80 Kernel version: Darwin Kernel Version 20.3.0: Thu Jan 21 00:06:51 PST 2021; root:xnu-7195.81.3~1/RELEASE_ARM64_T8101 Fileset Kernelcache UUID: F78A48EC84D7C3283E7C6C67D00889A7 Kernel UUID: 9FE8C0DA-8ED0-381C-9CEC-2A779F3E1503 iBoot version: iBoot-6723.81.1 secure boot?: YES Paniclog version: 13 KernelCache slide: 0x000000001bc44000 KernelCache base: 0xfffffe0022c48000 Kernel slide: 0x000000001c778000 Kernel text base: 0xfffffe002377c000 Kernel text exec base: 0xfffffe0023844000 mach_absolute_time: 0x93297e5294c Epoch Time: sec usec Boot : 0x6038c8d6 0x0006a837 Sleep : 0x6043c127 0x000520c1 Wake : 0x6043c1c0 0x00025f6d Calendar: 0x6043c8dd 0x00025522 ...