Step 01
Open the app and add your T7.
Drag your T7’s volume from Finder into the drop zone. T7, T7 Shield and T7 Touch are all supported.
Fix the Samsung T7 write-speed bug in one click.
T7 Speed Restore is a free macOS app that fixes the well-known slowdown on Samsung T7, T7 Shield and T7 Touch SSDs, where the drive crawls along at ~2 MB/s. One click brings it back to 500+ MB/s. Your data is not touched.
Free & open source
macOS 15 (Sequoia) or later
MIT licensed
How it works
One click. A few seconds. Full speed back.
The app creates a small, temporary partition on the drive. That single operation resets the T7’s internal state and restores full write speed. The partition is hidden from Finder automatically, and your data is not touched.
Step 02
Run the benchmark to confirm the slowdown.
Click Run Benchmark. If the drive is affected, you’ll see write speeds well below what the T7 is capable of.
Step 03
Click Restore Speed and enter your Mac password.
The fix needs to repartition your drive, which requires admin access, so macOS will ask for your password. It’s used only to perform the partition operation; nothing is stored or sent anywhere.
Step 04
A volume called T7FIXER briefly appears.
This is the small partition that triggers the speed reset. The app unmounts it automatically within a second or two. After that it stays hidden, including across reboots and replugs.
T7FIXER partition, mid-fixStep 05
Run the benchmark again to verify.
You should see write speeds back at 500+ MB/s. The fix isn’t permanent. If the slowdown returns later, just run the app again.
Requirements
Works on any modern Mac, with a few caveats.
The fix only applies to T7-series SSDs formatted as APFS. exFAT and NTFS drives, common in Windows-only setups, aren’t supported.
Operating system
macOS 15 Sequoia
or later
Drive
Samsung T7,
T7 Shield or T7 Touch
Format
APFS
The default when you first set up the drive on a Mac. exFAT drives must be reformatted.Free space
At least 6 GB
Used temporarily by the partition that triggers the speed reset.FAQ
What you’ll probably want to know.
If anything’s missing here, open an issue on GitHub. That’s the best way to give feedback right now.
Because the app isn’t distributed through the Mac App Store, macOS Gatekeeper shows a warning the first time you open it. This is expected for any self-distributed macOS app.
To get past it:
- Right-click (or Control-click) the app and choose Open.
- Click Open in the dialog that appears.
Or open System Settings → Privacy & Security and click Open Anyway after the first blocked launch attempt.
Apple requires a paid Developer Program membership ($99/year) to distribute apps that run privileged operations silently. This app skips that, so macOS prompts for your password each time instead.
The password is used only to repartition the drive. It’s never stored or transmitted anywhere.
That partition is the fix. Creating it is what resets the T7’s internal state and restores full write speed, and it only needs to exist for a moment.
The app unmounts it automatically within a second or two of creation, and it stays hidden from Finder afterwards, including across reboots and replugs.
Your data is not touched. The fix carves a small amount of free space into a new partition; it never reads or writes the contents of your main APFS volume.
That said, it’s your data. Keeping a backup of anything irreplaceable is always a good idea, regardless of which tools you use.
No. The slowdown is a firmware-level issue with the T7 series, and the fix doesn’t change the firmware. If the slowdown comes back, just run the app again.
Yes, you can. There’s nothing magic going on under the hood:
the fix is just creating a small extra partition on the
drive, then removing it. You can do exactly that in Disk
Utility, or with diskutil on the command line.
The catch is that the slowdown is firmware-level and keeps coming back. So you’d be opening Disk Utility, picking sizes, formatting, mounting, and cleaning up again every time. T7 Speed Restore exists so that next time it happens, you click one button instead.
No. exFAT-formatted T7 drives are not supported. Neither are NTFS or other Windows-only setups. If your drive shows up as exFAT in Disk Utility and you don’t need it on Windows, reformat it as APFS first (this erases the drive, so copy your data off beforehand).
The drive must have no extra partitions after the main APFS volume. If you’ve added any manually, remove them in Disk Utility first, then run the fix.
Yes. The full source is on GitHub under the MIT licence. Issues and PRs are welcome.
Please open an issue on the GitHub repo. If you can, include your macOS version, your T7 model and capacity, and the benchmark numbers before and after running the fix. That’s the most useful kind of feedback right now.
Try it on your T7.
Free, open source, and small. If it fixes your drive, the best thanks you can give is a quick note on GitHub.