Finding specific things
Time Machine holds every version of a file you have saved. Getting at a specific one is less obvious than it should be.
Backups are deliberately excluded from Spotlight. Otherwise every search would return dozens of copies of the same file from different dates, which would be unusable.
Searching from inside Time Machine searches the backup catalogue rather than the live disk.
For apps that support Versions — TextEdit, Pages, Numbers, Keynote — File → Revert To → Browse All Versions gives the same interface without needing a backup drive at all.
tmutil listbackups
tmutil compare
tmutil compare shows what changed between the current state and the most recent backup, which is often faster than browsing.
macOS keeps hourly snapshots on the internal disk even when the backup drive is absent:
tmutil listlocalsnapshots /
These are why you can sometimes recover a file deleted an hour ago with no backup drive connected.
You cannot search it. This is the same limitation as any unmounted volume, and the reason keeping a record of what is on each disk — however you do it — pays for itself the first time you need it.
Not through Spotlight. Backups are excluded. Enter Time Machine and use its own search box.
Hourly APFS snapshots kept on the internal disk, allowing recovery even when the backup drive is disconnected.
Everywhere keeps track of every file on your Mac — including the folders Spotlight hides and drives you have unplugged. Free for a day, then $19 once.
Download for Mac