My MP7,1 turns sluggish and unresponsive after updating to macOS 15, and it has turned even worse after I updated to version 15.2 a few days ago, where the Mac no longer detects any Thunderbolt ports or PICE card I installed previously. The only way for me to solve it is to reset SMC every restart and pray it won't crash.
I would like to hear from any MP7,1 user with macOS 15 if you encounter the same issues. I have done an Apple diagnostic on it, but no problem was found.

No Thunderbolt port detected


Only can detect 1 graphic card installed
I would like to hear from any MP7,1 user with macOS 15 if you encounter the same issues. I have done an Apple diagnostic on it, but no problem was found.

No Thunderbolt port detected


Only can detect 1 graphic card installed