I just had WindowServer crash. Xcode stopped working shortly after that. I tried restarting Xcode 26.0.1 universal but it refused. I rebooted macOS 26.0.1 Tahoe and tried to start the same Xcode, no joy. I tried...six different already installed Xcodes, all displaying the "Xcode_26.1b quit unexpectedly." alert. Looking at the report:
Exception Type: EXC_BAD_ACCESS (SIGKILL (Code Signature Invalid)) Exception Subtype: UNKNOWN_0x32 at 0x00000001111e4000 Exception Codes: 0x0000000000000032, 0x00000001111e4000
Termination Reason: Namespace CODESIGNING, Code 2, Invalid Page
This seems wild to me.
Thanks!
-Mike