1 – Attach the disk Time Machine or attach the Time Capsule to your main Wi-Fi/internet router.
2 – Once available to your current Mac, hold down Alt (Option on some keyboards) on your Mac and click the Time Machine menu bar icon.
3 – Select Browse “Other Backup Disks”.
4 – The Time Machine disk should appear in a list, and once selected it you’ll see the standard Finder-based Time Machine view.
5 – Once in the finder window, move back in time to retrieve older files and simply choose what you want
Note: If the backup is encrypted you’ll be prompted to enter the password before you can gain access.