Disk Not Ejected Properly -- AGAIN AGAIN AGAIN AND AGAIN...

I just started getting these cascading Disk not ejected properly messages. I have upgraded to Sonoma 14.5 and it is if anything worse. This is the same 4TB LaCie drive that has been sitting in the same place with the same cable since 2022 when I bought my Mac Studio. The drive seems to work fine between all the error messages. Running First Aid in Disk Utility on the drive shows no errors.

I also have had this same "error message" on my iMac for several months. I've tried plugging my external hard drive into different ports but the same message pops up.

APPLE... PLEASE help us with this.

This is an apple issue, I started receiving these messages about 4 updates ago on Monterey. I use this OS because of my Mini hardware limitations, I also use this OS on my M1 Mini, both systems started sending these messages, however, the drive is still connected (so not a cable, apple BS), normally drives do not reconnect without using disk utility or reboot. Like others this normally happens after the drive goes to sleep, and reawakened, I started ejecting drives after I am finished, and have still received the message. I also experience bluetooth issues, slow mouse disconnected keyboard (unfortunately all apple). I think if you look at all the intermittent functionality now displayed by apple, some consideration to switching to the alternative might be warranted.

I have a LaCie disk and the issue "Disk Not Ejected Properly" happened over and over on my M2 Max. What worked is: I simply use the USB-C cable that came with my iPad (Apple's standard USB-C to USB-C charging cable) and now it works. No issues anymore. Seems the issue is really with the cable.

There is a reply at the beginning of this thread from November last year. The user turned off Screen Saver, which solved the problem. I did the same and my external disks remain attached.

Not really the ideal work-around, as Apple should fix the OS. But, at least I can make backups and keep my system going.

Jim

This is happening to me too, but with a twist. This on a MacBook Pro, M2 sonoma 14.6.1, A pair of unmatched 2Tb drives connected as RAID1 for Time Machine. The Raid 1 Back up gets the Disk Not Ejected Properly message some minutes after a back up. The drives seems to start and stop multiple times per hour, randomly, even when Time Machine isn't actively backing up, and even when the MacBook is asleep. Upon waking the computer next day, there's a sick of Disk not Ejected properly messages. The twist is , when "Browse Time Machine Back Up" is selected, a finder widow "Desktop-Local" opens, then immediately the MacBook screen goes black, the external display does not but the cursor and keyboard are disabled. Press "escape" to restore the MacBook screen with the Desktop finder window. Strange, two different issues. What to do to get the Time machine to work as it should, what to do to stop the drives disconnecting? Could it be the 2 bay drive dock being used? The Raid?

These issues did not appear with a 1tb 2.5" bus powered drive used as time machine. That drive worked, Did not disconnect, showed the browse backups feature

same here with multiple drivers, one of them a Lacie Rugged 5TB, but not limited. Messages pop up even as I speak now, not limited to going to sleep.

I am having a similar problem. Every morning my iMac with OS Ventura tells me my Seagate external HD has not been ejected properly. This did not happen until working with OS Ventura.

Mac OS bug for sure. Anyone know how to prevent the Mac from going to sleep? The settings are very limited in the control panel. I have 10 of these on screen right now.

Found this solution while we're waiting on an Apple fix -- Amphetamine (app store) is a "Powerful keep-awake utility". You can configure it to keep the external drives alive, when connected.

A couple of days ago, I swapped out the USB-C cable that I was using for my iPad charging cable. Since doing that, I have not had any disconnect messages.

i replaced the thunderbolt cord and adapter, thunderbolt to usb c/new thunderbolt connection, and it fixed the issue!!

Agree - this is a Mac problem - happens frequently, with ANY SSD connected to my Mac Studio thunderbolt ports with thunderbolt cable. Makes it impossible to back up to any SSD

Strongly agree. Every time I wake up my Mac Pro 2023 I have many disk eject statements. I've only noticed it after the last update. What gives?

LR

I solved this issue by simply swapping my USB-C cable to another one. Issue solved.