@DTS Engineer Thanks a lot for your information, could you help try on a physical M2 pro MacBook Pro machine? Here on my machine, the problem is reliably reproducible. I have filed a bug via Feedback Assistant: FB17159064 (dtrace freezes macOS Sequoia 15.3.1 on M2 Pro (MacBook Pro)) and have sysdiagnose and system info attached. If you need any more information, please let me know~ PS: I also tried on a M3 machine, dtrace works correctly, so I'm guessing this has to do something with M2 specifically.