So let’s dive into how we discovered the MemTest bug, devised a reliable work-around, and get into some nitty gritty details of MemTest86 operation. But there is good news: while normal operation of MemTest86 is limited under these new EFI updates, we also discovered some simple workarounds for testing your Apple’s memory in MemTest86. In short, the newly updated EFI causes MemTest86 to incorrectly fail certain tests. At Beetstech, we use a long-time industry standard, MemTest86 to perform a comprehensive test of each computer’s RAM.īut never the type to blindly accept test results, strange testing outcomes led us to discover a bug in MemTest86 affecting computers running the new EFI firmware. However, these EFI updates can cause some unwanted behavior when you test your Apple computer’s memory. Click the 'Download' button to download the macOS High Sierra installer. In the search bar, type in macOS High Sierra and select the wanted version of macOS High Sierra. Several of the changes include: the introduction of the Apple File System, support for NVMe drives, and the usual batch of security updates. Follow the steps below to download macOS High Sierra: Step 1.
If so boot to the USB stick, open Disk Utility now click on View in the menubar and select Show All Devices. With macOS 10.13, otherwise known as High Sierra, Apple introduced an ambitious EFI update. Is your USB a bootable installer of High Sierra.
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