new macbook pro seagate external hard drive time machine

So, it looks like these issues are specifically related to Monterey, and even though changing the partition type to APFS helps (on a different system), it does not resolve the issues completely. After re-connecting it to my old MacBook, I was able to erase it without any issues. I ran Disk Utility to erase it and try again, but it got stuck during the erase process. I set it up as Time Machine backup, and even though the first data transfer was successful, Time Machine got stuck with a “waiting to complete first backup” message. After that, it was successfully mounted on my new MacBook Pro.

I ran Disk Utility (on the old MacBook running Mojave) and re-initialized it with a single APFS partition (as opposed to HFS+). I then connected it to my old MacBook (via a USB cable) and it got mounted without any issues. When I first connected it, it failed to mount (the “mount_hfs” process was stuck indefinitely). I backup to a 18 TB HDD (Seagate) in a 4 bay external disk enclosure (Icy Box).

I’m having similar problems with the 2021 MacBook Pro (running Monterey) and a brand-new G-Drive (USB-C). I have Mac Pro that has bootcamp installed on it and the total space on.

New macbook pro seagate external hard drive time machine