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If you’re not sure how to discover the model code of your Mac, use the About This Mac command at the top of the Apple menu, and click on the System Report… button. The significance of this is unclear, but it suggests that the first EFI firmware updates for some models had problems, and have since been replaced with 00B versions in that supplemental update. In its revised list, included within the Supplemental Update, some of those changed to 00B, as noted above. Observation: in Apple’s initial list of versions for High Sierra, the minor versions were universally B00.

I don’t know whether this changed with 10.13.5, but no EFI firmware update is listed there for that model. Of these, only the Macmini4,1 was not updated in 10.13.5.Īpple doesn’t list the MacPro5,1, but Jay in a comment below reports it as being 0085 B00 following 10.13.4. Of these, only the MacBookPro7,1 was not updated in 10.13.5. Neither Apple nor Duo list the MacBookPro11,3, but iawhciwc in a comment below reports it as being 0142 B00 I suspect that this should now be updated to 0146 B00. MacBookPro12,1 0176 B00, may be 0177 B00 with latest betas.Of these, only the MacBookAir3,1 was not updated in 10.13.5. Of these, the MacBook6,1 and MacBook7,1 were not updated in 10.13.5. Of these, only the iMac10,1 was not updated in 10.13.5. iMac14,1, iMac14,2, iMac14,3 0130 B00, or 0122 B00 for El Capitan?Īpple doesn’t list the iMac12,2, but Ariel in a comment below reports it as being 004E B00 following 10.13.4, and I expect that to have risen to 004F B00 following installation of 10.13.5.Since the initial release of High Sierra, I have maintained this list from those firmware updates included in each system software and security update. Which displays the recognised EFI firmware versions known to the eficheck tool (High Sierra only). Ls /usr/libexec/firmwarecheckers/eficheck/EFIAllowListShipping.bundle/allowlists You can obtain the latest list by typing the following in Terminal: Because this latest version of macOS includes a new tool, eficheck, which performs a weekly check on firmware, there was a list of known firmware versions included in that. At least, it didn’t until it released macOS High Sierra. Please refer to that more recent article instead.Īpple doesn’t provide a list of the current EFI firmware versions which should be installed on each model of Mac. If you are having trouble installing an update try disconnecting non-essential devices and use only an Apple branded keyboard, mouse and monitor.įor more information, please visit this website: About firmware updates for Intel-based Macs.⚠️ This article is now superceded by Which EFI firmware should your Mac be using? (version 2) Some USB and FireWire devices may prevent firmware updates from installing correctly. If you normally start up using a RAID (Redundant Array of Independent Disks) subsystem, you must instead start up from a Macintosh-formatted storage device to apply this update. Note: This update requires a Macintosh-formatted disk or partition. If these instructions appear on your screen again, the firmware update was not successful. Click OK, if the firmware is now up-to-date.Your computer restarts automatically when the update is completed and opens the Mac Pro EFI Firmware Update. Press and hold the power button on your Mac Pro until the power indicator light flashes repeatedly, then release the power button to begin the update.Ī status bar indicates the progress of the update.Click Shut Down in the Mac Pro EFI Firmware Update window and wait for your computer to shut down.To update the firmware on your Intel-based Mac Pro: Note: Print or write down these instructions before you begin the update. You can confirm the version of the Boot ROM installed on your computer using System Profiler. This EFI Firmware Update fixes several Boot Camp and start up issues on Mac Pro computers.Īfter the firmware update is successfully applied to your computer, your Boot ROM Version will be: