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

I'm running a MacStudio with Sonoma. However, I had this issue on the macOS Ventura, too.

But...it happens not just when the machine sleeps but when I'm using it. All day long, those notifications pop-up. I'm using a 5TB LaCie Rugged drive via USB-C. It's only for Time Machine, though.

When I woke my 2018 MacMini up this morning, it had 4 "disk not ejected properly" warnings on the screen, despite my upgrade to Ventura 13.6.1. I have notified Crucial, and they asked me for details, so I think they are working on it. I also will alert them of your comment that this is even worse with Sonoma. (It also convinces me I don't want to upgrade to Sonoma.)

Has anybody got through to Apple?

Yes, thank you for saying this. As I also mentioned, the problem is not limited to Crucial brand drives. Although it does occur frequently with my Crucial drive, I have this issue with numerous brands of drives, all of which occur sporadically.

I have the same issue. I'm curious why repeated "solutions" given like cable, connections, power, etc when most users with similar complaints NEVER made any change in the setup/settings? I never had this happen before Ventura and now I'm with Sonoma, and the issue still exists.

as OP mentioned in one of their replies, I agree it's a software issue, not hardware and Apple needs to seriously look into this problem.

I am using a Satechi mini hub with an ssd drive in it for my Time Machine backups... I only started having this problem AFTER I upgraded to Sonoma... It' VERY annoying for this error message to keep popping up...

I have the same problem as well and just tried the screen saver option I saw above. It drives me crazy. The thing is, some days it will happen a few times, and other days it will be dozens. Also, when I shut down my mac it fires up again on its own!?!?!

iMac 2019 got brand new external SSD (internal is dying, failing SMART) and brand new external enclosure (was having issues, Seagate sent a new drive under warranty, was still having issues, so got a new external enclosure USB3.2 with an eye for when I get the M3 Mac Studio). both are USB-C with brand new USB-C cables.

so this is the first time that I am using the USB-C ports on this Mac. till now, never had an issue with external drives (had two Time Machine external drives, and three other external disks)

both the SSD Thunderbolt/USB4 and the external enclosure give random Disk Not Ejected Properly (but not continuous as described here)

so I am wondering if there is something with the USB-C ports on the iMac?

I have Sonoma 14.3.1, I’m not a techie person like you guys! Really thought I was going a little crazy! Have changed cables, have done everything this Grandma knows to do and still getting “DISK NOT EJECTED PROPERLY” Now after listening to you guys I know I’m not going mad! Started about 2 months ago after my last update! Now I know it’s an Apple issue! Thanks for all of your insights!

I've been experiencing this problem recently, on my Macbook Pro 16" (Intel) running MacOS Monterey. This hasn't been a problem for me. The disk I have is fairly new, too, it's an 18TB OWC Mercury Elite Pro drive. I checked the physical connections. The only change is the recent update to the MacOS 12.7.3, but I can't say that's the issue. But it's been happening with some frequency and it interfering with my TM backups. I do not use a screen saver, I simply have a "hot corner" that blanks the screen on demand.

It is incredible to me that this problem has persisted as long as it has without a fix from Apple. This is one of several serious problems I've noticed with the MacOS. It is pretty evident that Apple does not have its "A" team working on the Mac, since the Mac represents a tiny fraction of their revenues. iOS, on the other hand, seems quite solid.

I do my computing with FreeBSD and Linux. But my wife needs to use an easily replaced system (I'm her IT department and am 81 years old, so may not be available to set up a new system for her) that can do encryption, so the choices are the Mac and Windows. Much as I dislike Windows, it was clearly the better choice, because in our experience, Windows exhibits far fewer problems. We've given up on the Mac.

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.

This blows my mind, this is the main problem with Apple products. It seems that their personal agendas for product marketing and development is more important than support. I have been a windows and mac user since the 80s. Say what you may say about Microsoft, but there is a legion of people ready to solve system issues. Yes they have a never ending line of issues but they are all due to them having a million different hardware systems they need to be compatible with VS Apple that they control every aspect of their hardware and software. Yet we have these issues and NO support or resolution. This issue has been happening for so long (years) that they clearly DGAF.

Every day I have to clear a legion of these notifications on the screen for a backup hard drive that has 0 issues, other than the Mac OS continuously causing these when I walk away. Everything is set to never go to sleep for the hard drives and even the computer/screen. Yet these persist, regardless of the settings or how much electricity I waste by leaving everything running 100% to make sure the backups run properly. Yet still! get back to the workstation with a long strip of notifications. No cable change or OS configuration I do will fix this issue.

Apple fix your OS. This is such an old issue. The fact that we are ****** is because eventually it gets old, that nothing gets done about it.

I'm getting the same problem one year later. Macbook Pro M2 Sonoma 14.5. Despicable. All my external drives keep getting disconnected ALL THE TIME. I need to run a program from an external drive and just can't do it. Will this be fixed?

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.

Just updated to Sequoia 15.0 and this continues to happen! It even happens when computer is not in sleep mode. Tried connecting to different USB ports, turned off screen saver, auto sleep, etc. Didn't help. I've also had the error below when leaving my Mac in Sleep mode over night, before updating to Sequoia. I'm wondering if it's related to the disk not ejecting properly bug. Hasn't happened again…yet.