

Replacing this with the original USB 3.0 cable, which came with the drive, fixed this completely. I had a flurry of messages like this (10 or more in 30 mins), and it turned out to be a USB 3.0 cable that works fine for a PC, but is perhaps not well shielded against Thunderbolt/DisplayPort (two plugged into this Macbook Pro) so it causes disconnects. Hoping an update takes it away as silently as it appeared. I ran first aid with disk utility, everything is fine. Presumably the time machine volume has a trickle of OS activity that keeps it online and that accounts for only one of them going missing.Īt first I thought my drive might be failing, but if I power it off and back on, it always shows up in the finder. I was on El Capitan for awhile without issue, but the latest upgrade brought the issue. This has only happened since upgrading to the latest version of El Capitan. The drive that gets disconnected from El Capitan is always Drive 1, the drive not functioning in Time Machine capacity. Nothing has changed positions, no new cabling, no electrical changes and so on.Įxternal Drive 1 has files on it (1/2 TB give or take)Įxternal Drive 2 is my Time Machine Volume (yes I realize it is the same size as my external drive and could not hold my external drive files plus the mac mini files if both were at capacity) They sit side by side where they have sat for the entire time I've owned them and the computer. Bought at the same time from the same place, both connected via usb, both in place since I purchased the mini. I have two of the drives mentioned above. Wondering if this is an issue with Monterey since the older coms are not running that OS and are working fine.I think it's El Capitan, at least in my case.

Not sure what to do as the internet isnt helping solve the problem.

It also still works on older devices.Ĥ) The other drive is brand new and nothing is working for that one to mount as well. ( error 49153."ģ) I have run diagnoistics on the older drive and everything came back fine. Neither are working on the new ones.Ģ) I have looked in disk utility and I can see the drives but I cannot mount them. No matter what I do I can not get ANY exernal drive to mount on any of my new Macbooks running Monterey.ġ) I have downloaded the WD discovery and utility which is the program that has helped my older macbook and imac mount the drives. I also bought a brand new external drive (WD My Passport- which is suppoed to be compatable with macs) as well as have my old external drive (WD My Passport) that has been working on my old mackbook 15in and my even older iMac for years. My Passport Drives not working on brand new comp I have recently bought a brand 2 new Macbook Pro 14in and its running Monterey.
