New Apple Mac Pro has a glitch with internal SATA drives
Friday, June 16, 2023 at 5:07PM 
Apple has acknowledged a bug that causes some internal SATA hard drives to disconnect from the 2023 Mac Pro after the computer wakes from sleep. The company will release a "future macOS update" to fix the issue.
The Mac Pro, which recently launched with Apple's M2 Ultra chip, comes with SSD storage but also has SATA ports for connecting additional hard drives. However, due to a glitch, some of these drives may disconnect when the Mac Pro resumes from sleep mode.
Apple explained in a support document that if your Mac automatically goes to sleep or if you manually put your Mac to sleep, then certain models of internal SATA drives might unexpectedly disconnect from your computer. "If you see a message that your disk was not ejected properly, you can restart your Mac to reconnect to the drive," they advised.
Until Apple releases a software update to address the problem, you can prevent your Mac Pro from automatically going to sleep by changing a setting in the System Preferences app. You need to click on Displays → Advanced…, and enable the option Prevent automatic sleeping when the display is off.
The new Mac Pro has the same design as the Intel-based model from 2019 but does not support graphics cards or user-upgradeable RAM due to Apple silicon's unified architecture. If you do not need PCIe expansion, you should consider the Mac Studio instead.