This_is_annoying_a_lot wrote:
Pressing the option key does not help me. The Backup drive is connected, and time machine also shows me the drive. But the latest backup there is from today. If you open the drive there are two top folders, a new one has been created with only a backup of today. So it really seems like time machine is treating this like a new computer. I used the migration assistant but it always says "process unexpactedly aborted" or something like that, without any specific reason why. This is the same Mac Book and the same Hard drive. This is the first time I need my time machine and it does not do its job at all.
see this ref—
Enter TM and then use the keys Shift Command C This will bring upfront your main drive. You can now scroll back in time. Once you get where you want you can then open the drive and scroll down to your user library and documents, downloads, etc. and you may find the item you want. Copy to desktop and use or move from there.
ref: How to access Time Machine files from previous OS install?
https://discussions.apple.com/thread/5579823
I will say that Time Machine is great when it works, not so much when it does not...
3-2-1 Backup Strategy: three copies of your data, two different methods, and one offsite.