User level: Level 1 (4 points)My Apple M-1 MacBook Pro, running on macOS Tahoe 26.6.2 suddenly crashed. screen went black, and then the secondary screen sort-of took over. It's on again and working, but can you help me out here on what happened and how to possibly avoid it in future? Thanks!
the error message was as in the additional text message
[Re-Titled by Moderator]
Original Title: M1 crash
Posted on Sep 21, 2026 6:58 AM
User level: Level 10 (148,617 points)Sep 21, 2026 7:40 AM in response to Richard_gold
The I/O DART mentioned at the heart of that report is really a memory management unit specifically for I/O (i.e. peripherals) - and it has to cooperate with the main system memory management unit in order to, well, manage memory.
do you have any shaky peripheral devices connected?
User level: Level 10 (208,430 points)Sep 21, 2026 9:07 AM in response to Richard_gold
last started kext at 5965361225569: com.apple.iokit.SCSITaskUserClient 545.100.10 (addr 0xfffffe001f5b5de0, size 2206) loaded kexts: (skipped, see boot kernelcache)
I also see this in the report—
SCSI (Small Computer System Interface)—a prompt requesting system permissions, a process running in Activity Monitor, or an installed application—I might suspect third-party software
A standard protocol used by macOS to communicate with attached devices...
User level: Level 1 (4 points)Sep 21, 2026 8:33 AM in response to Grant Bennet-Alder
I have a brand new Dell U2725QE monitor connected to my Mac
Originally posted at discussions.apple.com/thread/256361942