I'm on Mac OS 12.2.1, and I'm running into the problem listed in this topic.

Changing baud rate to 460800
Changed.
Configuring flash size...

A fatal error occurred: Timed out waiting for packet header
*** [upload] Error 2
============================================= [FAILED] Took 4.46 seconds =============================================
The terminal process "platformio 'run', '--target', 'upload'" terminated with exit code: 1.

When using the supplied firmware update tool, I'm getting following error:

Detecting M5Stack products.
Find M5Stack products.
Kernel driver deteched.
Apply magic success.

Fail to cast magic stage 2, please contact vendor.
Waiting for device in DFU mode.....................
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[Process completed]

Any suggestions would be appreciated. Thank you!