DFU restore with Apple Configurator, step by step
A new storage module is blank. Nothing on it can boot, so the Mac Mini has to be restored the way Apple restores a Mac that will not start: in DFU mode, from a second Mac running Apple Configurator. Plan for 30 to 60 minutes, most of it waiting for the download.
What you need
- A second Mac with a recent macOS, connected to the internet, with Apple Configurator installed from the Mac App Store. It is free.
- A USB-C to USB-C cable that carries data, not a charge-only cable. A Thunderbolt cable is the safe choice.
- The Mac Mini with the new module fitted and closed, plugged into power. A display is optional and stays black during the restore.
- Your Time Machine backup, for afterwards.
The steps
- Open Apple Configurator on the second Mac.
- Plug the cable into the second Mac and into the Thunderbolt port on the Mac Mini that Apple designates for DFU. Apple's revive or restore article shows which port for each model.
- Unplug the Mac Mini's power cord and wait ten seconds.
- Press and hold the Mac Mini's power button, plug the power cord back in while still holding, and keep holding until a DFU icon appears in Apple Configurator on the other Mac. The Mac Mini's own screen stays black; that is normal.
- Select the DFU icon and choose Restore from the Actions menu, not Revive. Revive only repairs the firmware and leaves the module blank.
- Wait. Configurator downloads the current macOS and writes it. Do not unplug either machine. The Mac Mini restarts on its own when it is done and the setup assistant appears on its display.
- Walk through the setup assistant and, when asked, migrate from your Time Machine backup.
When the Mac Mini does not show up
- Try the other Thunderbolt port on the Mac Mini, and a different cable. Charge-only cables are the most common cause.
- Redo the power-button sequence. Timing matters, so unplug power for ten seconds first.
- Plug the cable straight into the second Mac, not through a hub or dock.
- If Configurator shows the Mac Mini but the restore stops with an error, note the number and email [email protected]. Apple's article lists the common ones.
- Nothing works at all: open the Mac Mini and check that the module sits fully in its connector and the screw is in. A module that is not seated behaves exactly like no module.
Watch it done
The iFixit video on the Mac Mini M4 SSD upgrade shows the hardware swap and the DFU restore in one take. iFixit is an independent repair site; we link to their video because it matches our steps.
Related questions
- Can I do the restore from a Windows PC or an iPad?
- No. Apple Configurator only runs on macOS. Borrowing a Mac for an hour is enough. If that is not possible, email [email protected] and ask about our pre-installation service.
- Does the restore need my Apple Account?
- The restore itself does not. The setup assistant afterwards asks for it, as on any new Mac. If Find My was on before the swap, Activation Lock applies, so use the same account.
- Which macOS version does it install?
- The newest version Apple offers for the Mac Mini M4 at that moment. You cannot pick an older one in this process.
- Do I have to do this again later?
- No. The DFU restore happens once, when the module is new. macOS updates afterwards install the normal way.
Ready to upgrade?
More guides
- Is the Mac Mini M4 SSD upgradeable?Yes, and this is the first Mac Mini in years where that is true. What the swap involves before you order.
- M4 vs M4 Pro: why the storage module is differentTwo Mac Minis from the same year, two different modules. Check which one you have before you order.
- Which Mac Mini models are compatible?One model fits. The rest do not, and here is why, year by year.
- What is in the box, and the 2-year guaranteeThe module, the tools, the plain packaging, and what happens if something is wrong.
- Mac Mini M4 as a home server: why storage runs out firstLow idle power, quiet, and small enough to disappear on a shelf. What a home server actually stores, and why the base 256GB is gone before the real job starts.
- Running local AI models on a Mac Mini M4: the storage mathMemory decides which model you can run; storage decides how many you keep, plus the caches that grow beside them. Sourced download sizes and a computed storage budget for 256GB, 512GB and 2TB.
- A remote AI coding setup on a Mac Mini M4 with Tailscale, mosh and herdrTailscale connects the two machines without port forwarding, mosh keeps the shell alive across sleep and Wi-Fi changes, and herdr keeps AI coding agents running between sessions. Setup steps, honest caveats, and a computed storage budget.