In a support document published today, Apple said certain SATA hard drives might unexpectedly disconnect from the 2023 Mac Pro after the computer wakes from sleep. Apple said it is “aware of this issue” and will fix it in a “future macOS update.”
While the Mac Pro is configured with SSD storage, it has SATA ports for connecting internal hard drives, and some can disconnect due to a bug.
“Certain models of internal SATA drives might unexpectedly disconnect from your computer after your Mac wakes from sleep,” said Apple. “This can occur if your Mac automatically goes to sleep or if you manually put your Mac to sleep. If you see a message that your disk was not ejected properly, you can restart your Mac to reconnect to the drive.”
Read more at MacRumors.com