![]() ![]() Macintosh Posted on JJCategories #MacAdmins, Apple Configurator 2, BoardID, BridgeOS / iBridge, DFU Mode, Enterprise Content, macOS ISPW Firmware 4 Comments on Mac Intel T2 BridgeOS Download Database – Upgrade or Downgrade! How to Downgrade BridgeOS on an Intel T2 Mac with Apple Configurator 2! If you have any questions, you can post them below! Author Mr. T2 Macs from 2017-2020 iBridge Product ID If you would like to learn how to do this, click on the link below! (Apple will unsign previous versions of iOS about one week after a new update) How to Downgrade BridgeOS on a T2 Mac The BridgeOS signing schedule follows iOS. *Apple will usually leave the previous version of BridgeOS signed for about 7 days after the release of a new update. Apple usually supports T-1*, current minus one version. NOTE! You can only downgrade back one previous version. You will now be running 11.2 and the matching bridgeOS version 18P4346. After downgrading BridgeOS you will need to reinstall/downgrade 11.2 over the top of 11.2.3, or reinstall 11.2. If you downgrade BridgeOS to an older version than the installed OS then macOS Big Sur will not boot and you will be prompted to update BridgeOS from the macOS Update Assistant environment. You will need to downgrade macOS down to 11.2 to support the previous version of BridgeOS. You now want to downgrade to a previous version so you can single out the issue. ![]() Something in the new version of bridgeOS is causing problems on your T2 Mac. Why would anyone want to downgrade BridgeOS?Įxample – You updated to macOS Big Sur 11.2.3 from 11.1. The requirement for BridgeOS downgrade is that you need to satisfy the minimum OS Version or newer. You can downgrade BridgeOS to one previous version (with in 7 days of a new os update) if you are having issues or would like to test the software update mechanism. (Signed = You can upgrade or downgrade) All links are Apple Software Update direct downloads. In the chart below is a list of previous BridgeOS IPSW files along with the signing status. You can now even downgrade BridgeOS on a T2 Mac up to 7 days after an update! You can now upgrade or downgrade BridgeOS with an IPSW file and Apple Configurator 2! You can now upgrade or downgrade BridgeOS on your Intel T2 Mac with an IPSW file & Apple Configurator 2!Īs soon as Apple released the very first T2-equipped Mac, MacAdmins wished that they had a way to downgrade BridgeOS. Macintosh Posted on JOctoCategories #MacAdmins, Apple Configurator 2, Apple Silicon, Enterprise Content, M1 iMac, Mac DFU mode, macOS 12 Monterey, macOS Beta, macOS Virtualization, VMware Fusion & Parallels 11 Comments on You can now Virtualize macOS on an M1 Mac with macOS Monterey! Mac Intel T2 BridgeOS Download Database – Upgrade or Downgrade! MacOS Monterey IPSW Restore File – Credit & Thanks Ming Chang Virtual Machine Fork Xcode Project Download – ![]() KhaosT updated VM GUI called MacVM Download Links KhaosT just released a new update to his code that gives us control over the VM Settings. When AC2 finishes the install you should be done and your vm should boot to macOS 12 Setup Assistant! UPDATE! Drag macOS 12 IPSW file into Apple Configurator 2, click Restore to install macOSĨ. Temporary disable macOS Firewall and iCloud Private Relay (Apple Configurator 2 can’t restore VM with those features enabled) Both are default off if you did not turn them on or sign in with your AppleIDħ. Open Apple Configurator 2, if everything works, There should have a VirtualMac in DFU modeĦ. Quit the app when “Virtual Machine” window showed up, move disk.dmg into the app’s containerĥ. Clone this project from Github save as zip for use in Xcode. Empty dmg image (This will be your system storage, name it disk.dmg, you can create it from Disk Utility)ġ. ![]() Apple Silicon M1 Mac (running macOS Monterey).My video walking you through the process of setting up a virtual machine that can run macOS Monterey! Requirements & Instructions (Modified Original Instructions) ![]()
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