![]() This is Apple's firmware installer for that Mac Pro model. Running it reported that "This software is not supported on your system." So then I went to Apple's firmware upgrade page here:Īnd downloaded the firmware installer for the Mac 5,1 here: If these instructions appear on your screen again, the firmware update was not successful. The software is available for download from Apple’s Web site. Click OK, if the firmware is now up-to-date. Apple has posted a revised version of its MacBook Pro EFI Firmware Update, to version 1.5.1. Latest Tuning/Utility Software Revisions MS1, MS2, MS3 Firmware Other MegaSquirt Related Software AMP EFI and DIYAutoTune custom TunerStudio dashboards. The EFI removal tool supports iMac, iMac Pro, Mac Mini, MacBook Air, Mac Mini. Your computer restarts automatically when the update is completed and opens the iMac EFI Firmware Update. I did that twice and each time, it would boot back up without performing the firmware update. Use the iRemove tool to remove Apple EFI Firmware password protection from. Download Apple Mac mini (Mid 2010) EFI Firmware Update 1.5. What happened to me is that when running the High Sierra installer on the 2010 Mac Pro (Mac Model 5,1), that the installer mentions that you need hold down the power button until it blinks or the Mac emits a high pitched noise. Apple OS X Mountain Lion 10.8.2 Update for 13Macbook Pro with Retina Display, 21.5 iMac. ![]() It fails during installation with the message "an error occurred while verifying firmware. Those models with T2 chips consist of two parts, the second covering iBridge in the T2. That displayed in System Information for Intel models uses five decimal numbers separated by dots, e.g 96.0.0.0.0, and is given below. Apple Mac Firmware Updates Are Quietly Failing and No One Knows WhyĪnd… I am unable to upgrade to High Sierra GM. Apple doesn’t provide an official list of the current firmware versions which should be installed on each model of Mac. People reporting that they have tried it 7 times and other reporting that they have waited 12 hours for the install to complete. There are also loads of Google results for people who can't perform the High Sierra firmware upgrade across multiple Macs. The failure of Apple's EFI updates prevents High Sierra from installing since this is required before it does. Mac Pro EFI Firmware Update 1. You can't install High Sierra without performing a firmware upgrade on that Mac. For additional information, please visit: OS X Mountain Lion: Firmware updates may keep reappearing in the Mac App Store. The updater will launch automatically when the Installer closes. Did you read the post? It's for installing High Sierra on a Mac Pro that was made in 2010. To complete the firmware update process, please follow the instructions in the updater application (/Applications/Utilities/MacBook Pro EFI Firmware Update.app).
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