How to check your Mac’s EFI firmware version The iMac Pro, 2018 MacBook Pro with Touch Bar (MacBookPro15,1 and 15,2), 2018 Mac mini and 2018 MacBook Air all use a different mechanism for firmware updates, managed by their T2 chips. I am extremely grateful to Pico, who provided a complete listing, to all those Mac users who have confirmed version numbers as well, and to Pico who kindly gave me a script to unscramble numbers from updates. See below for further information about this model. See below for further details of how to obtain this. This is made up from the model designator IM144 = iMac14,4, the code 88Z or sometimes AAPLEFI4 or AAPLEFI5, the version number 0190 B00, and the datestamp of that version 1809171521 = 18/09/17 15:21. The full eficheck version number is likely to resemble I therefore provide those numbers, where known, in parentheses after the ‘new’ version number. What is more, some models which share the same ‘new’ version number have different versions according to eficheck. The numbering system used by the eficheck tool still uses the older system with two hexadecimal numbers, e.g. That displayed in System Information uses five decimal numbers separated by dots, e.g 96.0.0.0.0, and is given below. If your Mac is a running Catalina and is a more recent model, then it should be using new EFI firmware as detailed here. If you are running an earlier version of macOS, such as El Capitan, then you should refer to the previous version of this list instead. The following lists give the EFI firmware versions supported in the Mojave 10.14.6 Security Update 2020-004 amd High Sierra Security Update 2020-004 released on 15 July 2020. These changed in the Mojave and Security Updates released on 30 October 2018: the version number given in System Information is now completely different to that offered by the definitive system tool eficheck, and those installers contain many EFI firmware updates which don’t reveal their version numbers (in either numbering system). Until 30 October 2018, it provided usable version numbers in System Information, and macOS installers and updaters also gave details of any EFI firmware updates which they contained and installed. The download links for the V4 downloads are still provided for those that prefer to work with the V4 bootable images.Apple doesn’t provide an official list of the current EFI firmware versions which should be installed on each model of Mac. In order to run MemTest86, PCs with legacy BIOS platform must use the older V4 release of MemTest86. However, you must use either Windows, Linux or Mac to create a bootable USB drive.įor information on creating a boot disk in Linux/Mac, visit the Technical Information pageĪs MemTest86 V10.5 supports only the newer UEFI platform, older PCs without UEFI support would be unable to boot MemTest86. The version of Windows, Linux, or Mac being used is irrelevant for execution. MemTest86 is a stand-alone program that does not require or use any operating system for execution.Installation and usage instructions are available on the Technical Information page.Please download the older V4 BIOS release of MemTest86 instead. On machines that don't support UEFI, MemTest86 will not boot. IMPORTANT: MemTest86 V10.5 images support only UEFI boot.* Once the purchase has been completed, a download link shall be provided that will contain the files needed to create your own bootable media.Ī pre-installed MemTest86 Pro USB Drive is available on our Pricing PageĪ site license is also available, for unlimited use of the software in a company, on our Pricing Page Documentation MemTest86 User Guide
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