"Disk not ejected properly"
I'm running 10.14.6 Mojave on a 2009 Mac Pro with dual Xeon x5690 processors (6 cores & 3.46GHz each) and 48GB RAM. The system drive is a 1TB SSD.
I haven't had this problem EVER before I started running Mojave. I've read that it started happening to people from High Sierra upwards, but the last OS I ran before Mojave was El Capitan 10.11.x.
This happens (displaying "Disk not ejected properly") as it's supposed to; if you unplug an external drive or flashdrive without ejecting it in the software first.
But the problem is that it ALSO happens if I put the machine to sleep and then wake it.
1) This has happened with a wide variety of hard drive brands/capacities/types/formats.
2) External drives connected in toasters/enclosures.
3) External drives in permanent enclosures.
4) USB flashdrives.
5) The machine is set to never go to sleep, so it is not an issue with that. Only I put it to sleep, and this happens. By either selecting it from the menu, or pressing the power button for a second or two until it goes to sleep.
I can't see this being ANYTHING other than a software problem. Does anyone have any ideas/have the same problem/and more importantly, solutions?
I REALLY don't want my drives/data to be corrupted, as I have numerous drives connected through numerous USB ports (2 and 3) and sometimes firewire.
Thank you to ANYONE who can help!!!
Mac Pro, macOS 10.14