![]() Now that your M1 is in DFU mode and shows up in Apple Configurator, drag the downloaded IPSW file from Step 1 into the DFU window.Ĩ. Continue holding the power button until you see DFU appear on the host machine.ħ. Mac mini: Hold down the power button, and THEN plug in the cable. You will see DFU appear on the host computer. MacBook Pro or Air: Hold down the power button, right shift, left option, and left control for EXACTLY 10 seconds, then release all keys except power for 7 seconds. ![]() Enter the DFU mode on the M1 Mac ( watch this YouTube video for help on how to do this) … timing is important! On the Rescue Mac, run the Configurator 2 application. Mac mini: left most connection, next to Ethernet portĥ. Note – you must use the following Thunderbolt port on your M1 Mac or the factory reset won’t work: Download the IPSW firmware file for macOS version 11.1 from Apple’s CDN onto the Rescue Mac.Ģ, On your Rescue Mac, go to the App Store and download Configurator 2.ģ. This second Mac, which I will call the Rescue Mac, can be any Thunderbolt 3 or USB-C equipped Mac running Big Sur.ġ. You will need a second Mac to perform the factory reset operation. Performing a factory reset is truly the last recourse, but it is what I recommend when there is no other option. The problems we have fixed this way include things like M1 Macs no longer booting and M1 Macs losing all network access. During our 6+ months of testing, we have had to perform this factory reset four times (and we only have five of the M1 Macs). There are many other situations where you might have to perform a factory reset on an M1 Mac. If this is not an option for you, my final suggestion is to perform a factory reset on your M1 Mac. If you do not have a Time Machine backup, I recommend using an Intel Mac with your SoftRAID volumes until Apple fixes the problem. We warned you not to update your M1 Macs until Apple released a fix for this problem and recommended that if you already had updated and needed to revert to macOS 11.1, the best route was to restore your most recent Time Machine backup. Last week we alerted you to a critical issue with macOS Big Sur 11.2 which makes SoftRAID volumes inaccessible on M1 Macs.
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