I did a really dumb thing when I looked at my back up drive. I saw that?the back up for my old Mac Pro was in there, and without thinking I sent?it to the trash.
Jeannie
What kind of a backup is/was this?
A clone, a Time Machine backup, something else?
I ask only because there is a (relatively) simple, safe way of deleting Time Machine backups. I got this from a website, and have used it many times in the past:
How to remove Time Machine backups
Be careful with sudo and making sure you pick the correct Mac's files since there is no undo or confirmation of the following command:
sudo tmutil delete /Volumes/drive_name/Backups.backupdb/old_mac_name
The sudo command needs your password (and it won't echo to the screen, so just type it and pause to be sure you're deleting the correct files before pressing enter). If you want to be safer, you can pick one snapshot to delete first to be sure the command works as intended. This is nice since it could take hours to clean up some larger backup sets and you want to leave the Mac confident it's deleting the correct information store.
You can use the tmutil tool to delete backups one by one.
sudo tmutil delete /Volumes/drive_name/Backups.backupdb/mac_name/YYYY-MM-DD-hhmmss
Jim Saklad