I recently updated to macOS Big Sur, and I am having trouble with my external hard drive. The hard drive keeps randomly disconnecting from my Mac Pro so I can't really use the drive at all. Any one else have issues with that? It's WD Caviar Black 6 TB connected with the Orico USB3 dock. Thanks!
Mac Pro, macOS 11.0
OK, I have been doing some experiments and have not had a disconnection for a couple days. It appears (for me at least) as the trigger for the "DID NOT EJECT PROPERLY" event is when the Mac goes to sleep. I suspect it may be a combination of factors which I have not deciphered yet, including 1) Sleeping, 2) HHD, 3) TimeMachineBackup, and possibly marginal hardware.
By setting Energy Saver settings as follows and not manually entering sleep I have avoided the Disconnect for a couple days where it was reliably occurring at least once a day.
Can someone please try this and tell us if this works for you.
I am on an iMac where battery is not an issue so staying awake just wastes energy. This will have a more significant impact on Laptop users trying to conserve battery.
I have opened a Bug Report but it would be nice if Apple would at least acknowledge this is an issue that will be fixed. Apple?
Mine too. It's a Big Sur issue and Apple is covering it up. If you talk to their senior level support, they play dumb.
The same issue - on BS 11.2.3 M1 Mac Mini. Still doing it
Trying your fix now.
Thank you! This did the trick.
I'm having same issue on Big Sur with my M1 Mac Mini and USB hub with internal SSD attached.
I followed these steps, and it worked for two weeks.
Hello! Any news?
I can't solve disconnection problem since beginning of February.
I have Seagate STHP5000400 5tb.
I mean WTF Mac this is bull I had change the laptop to support suggestions knowing this will happen again !!!! Really just housewife stuff in this point !! Done
I have never installed an antivirus on my MacBook that disables an external drive. The problem is not solved by disabling the hibernation mode and antivirus!
I tried those settings...and many other things, and still have a problem. I am unable to back up to my external drives. No word from Apple. Has anyone solved this?
And there have been several OS updates and every time I hope they have addressed the issue. I try it...and nothing! Very frustrating
Could you say what you bought, David?
I'm using two Seagate 4TB external drives. The issue I spoke to has disappeared on my Mac since taking those actions.
My Mac is awake all the time, all sleeping setting are off. I have the same problem. Issue still not sorted...
I have been experiencing this as well.
I have reformatted the drive. Disabled Time Machine, Verified the Same Drive doesn't disconnect on non-Big Sur macs. Still happens.
I believe it may be related to the Music App. In some other forums the complaint is their Music Library is lost.
Do you all have your Music Library on the external disconnecting drive? I wonder if it is triggered by the Apple Music app.
Well I was running Apple Music today from a new completely local library. In fact no file content just purchased songs. Still had a disconnect. I am wondering if Big Sur may have changed the USB power threshold. Usually you get a "UsB devices disabled" Unplug the device using too much power. This is a frustrating issue. It has cost be a couple days work since my IDE used the external drive.
Big Sur Disconnecting My External HDD
