In order to replicate the issue just connect any external SSD wait for a while and it will be disconnected with message "Disk Not Ejected Properly". SSD is connected to M1 MacBook Pro. It's neither a cable issue because I tried multiple cables, nor an SSD issue as everything worked just fine before upgrade.
Drives like the MyBook came with software, and the manufacturer suggested you install that software.
What that software does is to "spare you the annoyance of having to re-initialize the drive" from its factory set Windows New Technology File System (NTFS, the W is silent because there are no other Operating Systems) or similar unusual (on a Mac) format. Instead, the software they provided would simulate a MacOS drive inside an NTFS file for your Mac.
The downside of using the manufacturer's software is that if the manufacturer's software is not loaded, the Macintosh Volume may not be readable, or may not be writable. This means that in startup manager, Installer, and in Recovery such as after a data loss, the Macintosh Volume may not be visible.
The standard advice given here to all users, including novice users, is to discard the manufacturers software and NEVER use it. "Best Practice" is to erase the physical device when new, using only MacOS Disk Utility, and create the fundamental data structures needed for consistent, reliable use by MacOS.
Be sure to "show all devices" which will allow you to ERASE the entire Physical Device by its immutable manufacturer-given device-name, not just user created Volume-name such as ‘Macintosh HD’.
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The litmus test for 'what format is that drive' is to run this Terminal command, and look for the NAME of your drive in the list. This is the output for an Apple File system drive, first for the (Physical), then for the (synthesized) APFS container-scheme:
diskutil list
...
/dev/disk6 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *240.1 GB disk6
1: EFI EFI 209.7 MB disk6s1
2: Apple_APFS Container disk7 239.8 GB disk6s2
/dev/disk7 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +239.8 GB disk7
Physical Store disk6s2
1: APFS Volume X14-SSD240 97.5 GB disk7s1
2: APFS Volume Preboot 26.5 MB disk7s2
3: APFS Volume Recovery 507.6 MB disk7s3
4: APFS Volume VM 20.5 KB disk7s4
my MacOS volume named X14-SSD240 is on a physical SSD drive about 240 GB in size.
Nikolas0980 wrote:
Apple is doing this on purpose because the company does not want you to buy cheap non-apple external drives.
I am not an Apple employee, so I am free to say what I want.
Apple behavior does Not follow your conspiracy theory.
Instead, Apple appears to take whatever reasonable steps they can take to make you a "Happy Customer". "Happy Customers" buy more stuff from Apple in the long run, and that is where Apple applies its energy.
Complete wrong, its disconnects when Mac is awake and disconnect drive when copy process going. Also, this drives very well working before sonoma and very interesting it normally work on Linux and Win stations without any issues with sleep, power of bla bla bla etc.
Any update when we will get a fix for Sonoma? Currently I can't plug any external APFS external NVMe drive to my M1 MacBook Sonoma. It can disconnect in any moment and corrupt the file system.
Mac won't recognize the external drive after sudden disconnect, and Diskutil can't repair the APFS container. Yes I have tried every possible command in terminal.
Mee Too' What's going on with Apple? My hard drives, Lacie 2T and G Tech Hard 4T drives, keep disconnecting and reconnecting. It's a nightmare since I upgraded to Sonoma 14.4' what they playing at!!!!!!
I have the Kingston XS2000, it keeps unmounting and won't stay mounted long enough to back it up. How did you back it up?? Did it stay on for a period to allow you to do it.
This whole unmounting thing is driving me F crazy, I'm really afraid of losing my data. And please don't say back it up, that's just the problem it won't let me. Apple wtf are you playing at??
same thing here, I've bought countless cables, adapters and drives to try and get it to stay connected. I bought this to do video editing and some days I can't even transfer the footage, it will disconnect constantly. Seriously thinking I should've bought pc.
Well...same. Currently, thank God, I only have this annoying "Disk Not Ejected Properly" when using my external SanDisk Extreme Portable SSD - 2TB. I've been using it for a year on my previous 2018 MBP with Mojave...and I NEVER HAD A SINGLE PROBLEM. But ever since I paid a fortune for a new max spec MBP with M3 Max and all that...I've started to get random unsafe ejects. Thankfully it doesn't happen during transfers or etc...or I've been very lucky.
It only happens ever once in a while...every X days. But it's truly annoying. ;((( After paying like like €6500 on a Mac, I get this stuff...It's sickening.
I'm having the same problem. All my external SSDs suddenly disconnect without the computer ever going to sleep mode. I keep getting the "Disk did not eject properly" message ALL THE TIME. This sucks. I need to run a program from an external drive, this obviously makes the program crash and I lose my work. Macbook Pro M2 Sonoma 14.5. Will this be fixed?
For me this happens so rarely (about once a month) that I still haven't ruled out the possibility, if my Thunderbolt port might be damaged. Is there any kind of USB log that shows connects and disconnects of USB devices?
Also having the same issue! Noticed it on both my 2023 Mac mini with a 3 disk traditional spinning hard drive configured as RAID 0 (using disk utility), and on my 2021 MacBook Pro with a Crucial X6 SSD.
Useless for now what I suspect is a failed disk.
I suggest you cut to the chase and replace the disk.
This disk is couple month old, and works fine with windows, so my assumption is that apple messed up in Sonoma somehow, maybe it is related to power management of the usb c ports
OK
Same issue here. Last night upgraded to Sonoma. After the upgrade my external drive keeps disconnecting.
Latest update not fix this issue still disconnect m2 drives
External SSD keeps disconnecting after upgrading to Sonoma
