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1. #Reinstall osx for imac 27 how to#
2. #Reinstall osx for imac 27 serial#
3. #Reinstall osx for imac 27 update#
4. #Reinstall osx for imac 27 pro#
5. #Reinstall osx for imac 27 mac#

#Reinstall osx for imac 27 mac#

The Target Mac MUST have the USB-C Cable Plugged in to the Left Hand side USB-C port. The Host Mac can have the cable plugged in anywhere. Apple notes that a Thunderbolt 3 to Thunderbolt 3 cable is not supported but I’ve tested it and it works fine. USB-C to USB-C Cable – The white Apple USB-C Charge will work fine.( USB-C Cable MUST Support Power & Data). Internet access on the Host Mac – “You may need to configure your web proxy or firewall ports to allow all network traffic from Apple” If the Host Mac is on 10.14 you will get an error 10) ( Example – If the Target Mac is on 10.15 you will need the Host Mac to be on 10.15. The Host Mac Must be on the same OS version as the Target Mac that you want to Restore. The Host Mac must have at least macOS 10.13.5 and Apple Configurator 2.6 or newer installed. ( The Host Mac will do the work and the Target Mac is the Mac you need to Restore) You will need to meet the following requirements – Setup and Cable Requirements before you begin.

#Reinstall osx for imac 27 serial#

This opens an overview of your Mac, including your Mac model, processor, memory, serial number, and version of macOS. To see the greater detail provided by the System Information app, click the System Report button.”Ībout my Mac > System Report > BridgeOS version = 5 5. How do I find the BridgeOS Version on my T2 Mac?įrom /en-us/HT203001 – “Choose Apple menu  > About This Mac. This is a list of T2 Mac that you can can have BridgeOS restored.Ĥ.

#Reinstall osx for imac 27 update#

If you are just messing around and something goes wrong (USB Cable becomes disconnected in the middle of the update for example) you could brick your Mac be forced to bring it in for service!!! 3. Performing these steps should only be used if you have exhausted all normal troubleshooting techniques. (Warning #2) Please keep in mind that the following instructions are for if your Mac will not boot or is in any of the 5 situations listed above. This option is for more serious issues where the Mac does not respond after installing an update. Actions > Restore = Reinstall BridgeOS & ERASE OS AND USER DATA! – This option will reinstall BridgeOS and erase the SSD.If a Revive does not work, move to the second option Restore. Actions > Advanced > Revive Device = Reinstall BridgeOS Only – Revive should be the first option to try.UPDATE! 04/13/20: (Warning #1) The new version of Apple Configurator 2 (2.12.1) has different options! how-to-downgrade-t2-bridgeos-beta-to-a-production-version/ 2. I go into more details in the link below. You might need to do this if you are having problems and want the native version of Catalina BridgeOS back on your Mac.

A beta is not meant to be production ready. You should not have to do this, as a newer version of BridgeOS will work just fine on your Mac.

#Reinstall osx for imac 27 how to#

UPDATE 09/20/20 – I just posted an article explaining how to downgrade a beta version of BridgeOS (Big Sur) to a production version (Catalina). how-to-reinstall-macos-on-your-apple-silicon-mac-everything-you-need-to-know/ UPDATE 11/17/20 – Apple Silicon Macs are live! This article will still work for restoring new Apple Silicon Macs! UPDATE 4/13/21 – When you use the Restore option it will also remove the firmware password!! – Troubleshooting DFU Mode & BridgeOS Update Problems Can I Downgrade from a Beta Version of BridgeOS to a Production version? Instructions for the Mac Mini (2018-2020)

#Reinstall osx for imac 27 pro#

Instructions for the iMac & iMac Pro (2017 & 2020) Instructions for the MacBook Pro & Air (2018-2020) Setup and Cable Requirements before you begin How do I find my T2 Mac BridgeOS Version? If you find yourself in one of these situations you can follow the instructions below.ĭeep Dive explanation on how to boot your Mac into DFU Mode + How to Reinstall BridgeOS with Apple Configurator 2 – Mr.

Failed BridgeOS or Failed Firmware Update

Restoring or reinstalling BridgeOS firmware would only be needed in the following situations. This is not something that you will ever normally have to do. This article will go over how to restore BridgeOS on your T2 Mac. How to Boot your Mac into DFU Mode Did a macOS Update Brick your T2 Mac? I will Show you how to Boot your Mac into DFU Mode so you can Restore BridgeOS. How to Restore BridgeOS on a 2018+ T2 Mac using Apple Configurator 2.