Usually not. Every Mac with a built-in SSD uses TRIM: when you delete a file and empty the Trash, macOS tells the SSD which space is now free, and the SSD clears it, typically within minutes. After that, there’s nothing left on the disk for any recovery app to find, however long it scans.
That doesn’t mean the file is gone. It often survives somewhere else: in a Recently Deleted folder, a Time Machine snapshot, or iCloud. And many other drives, including SD cards, USB sticks, hard drives and some external SSDs, don’t use TRIM at all, so recovery from them works much better.
What TRIM does to deleted files
On a hard drive, deleting a file only marks its space as free. The data stays until something new is written there, which is why recovery apps work. An SSD can’t simply write over old data. It has to erase a block before it reuses it, and it’s faster if it does that in advance. TRIM is how macOS tells the SSD which blocks no longer hold anything it needs. The SSD then clears them in the background.
Once a block is trimmed, reading it returns nothing useful. There’s no trick, setting or app that reverses it. That’s why a recovery scan of a Mac’s built-in SSD usually finds little or nothing of what you deleted.
Which drives use TRIM
| Drive | TRIM on a Mac | Recovery chances |
|---|---|---|
| Your Mac’s built-in SSD | Always | Low |
| External NVMe SSD on Thunderbolt or USB4, formatted APFS | Usually | Low |
| Other external USB SSDs | Varies: many with a SATA drive inside don’t | Varies |
| Any drive formatted exFAT or FAT32 | Generally not: macOS isn’t known to trim these formats | Good |
| SD and microSD cards, USB sticks | No | Good |
| Hard drives (spinning disks) | No, for most | Good |
How to check a drive
- Open System Information (in Applications ▸ Utilities, or search for it with Spotlight).
- Under Hardware, select NVMExpress for most SSDs, or SATA or USB for other drives.
- Select the drive and look for TRIM Support. “Yes” means macOS trims it.
Not every drive shows this line, especially behind a USB adapter. If it’s missing, assume an APFS-formatted SSD may be trimmed, and act quickly.
Where a deleted file might still be
If the file was on your Mac’s own SSD, look here, roughly in this order:
- The Trash. If you haven’t emptied it, the file isn’t deleted and hasn’t been trimmed. Select it and choose File ▸ Put Back.
- Recently Deleted in the app. Photos keeps deleted photos in Recently Deleted for 30 days. Notes and other apps have their own.
- Time Machine. Open the folder the file was in and choose Enter Time Machine from the Time Machine menu in the menu bar. If you use Time Machine, macOS also keeps hourly snapshots of your Mac’s disk for 24 hours, and it uses them when your backup disk isn’t connected. So a file deleted this morning may still be there even if your backup drive is at home.
- iCloud Drive. If Desktop and Documents sync to iCloud, deleted files can be restored for 30 days at iCloud.com ▸ Drive ▸ Recently Deleted.
- Older versions. If you overwrote a document rather than deleting it, many apps, including Pages and TextEdit, keep earlier versions under File ▸ Revert To ▸ Browse All Versions.
- Other copies. Email attachments, the camera or phone a photo came from, a USB stick or card you copied it from.
For more on each of these, see how to recover deleted files on a Mac.
Is it worth scanning an SSD at all?
Sometimes. Scanning is worth a try when:
- The SSD is one macOS doesn’t trim, such as many USB SSDs with a SATA drive inside. System Information shows TRIM Support: No.
- The SSD was formatted exFAT or FAT32, which macOS generally doesn’t trim. Drives shared with Windows PCs or cameras often are.
- The files came from a card or stick you copied to the SSD. Scan the card or stick instead. It may still have them.
Reco is free and reads the drive read-only, so a scan costs you nothing but time. Each file it finds shows how intact it is, so you’ll see quickly whether trimmed space came back empty. If the files were on your Mac’s own disk, use the Mac as little as possible until you’ve scanned it: every new write can land on the space you’re hoping to recover, though nothing can undo TRIM that has already happened.
Wherever the files were, save anything you recover to a different drive.
So it doesn’t happen again
On an SSD, a backup is the only reliable way back. A few minutes now saves the next loss:
- Turn on Time Machine with an external drive. Its hourly local snapshots alone cover many “I deleted it this morning” moments.
- Sync Desktop and Documents with iCloud Drive, or another service with a deleted-files folder.
- Turn on Reco’s Safety Net, which keeps what you delete for a few days so you can take it back. It’s off until you turn it on.
The flip side: erasing an SSD
TRIM works against recovery, but the same features make it hard to be sure an SSD has been wiped file by file. SSDs spread writes around to avoid wearing out (wear leveling), so overwriting one file doesn’t reliably overwrite every copy of it. Reco’s Forget for Good says plainly where it can’t guarantee this. To wipe a whole drive before you pass it on, see how to securely erase a drive.
Questions
Can deleted files be recovered from a MacBook’s SSD?
Usually not by scanning the disk. macOS uses TRIM on the built-in SSD, so the SSD clears the space of deleted files soon after you delete them. Your best chances are the Trash, Recently Deleted folders, Time Machine (including its local snapshots) and iCloud.
Is TRIM turned on on my Mac?
For the built-in SSD, yes, always. To check any drive, open System Information, look under Hardware ▸ NVMExpress, SATA or USB, and find the line TRIM Support. Not every drive shows the line.
Do external SSDs use TRIM on a Mac?
It depends on the drive. NVMe SSDs on Thunderbolt or USB4 formatted as APFS normally do. Many USB SSDs with a SATA drive inside don’t, and drives formatted as exFAT or FAT32 generally aren’t trimmed by macOS.
Does a file in the Trash get trimmed?
No. A file in the Trash hasn’t been deleted yet. Its space is freed, and trimmed, only when you empty the Trash or delete it immediately.
Can I turn off TRIM to get my files back?
No. Once the SSD has cleared the space, the data is gone, and changing a setting afterwards can’t bring it back.