On newer Macs from 2019(*) with the Apple T2 Security Chip, you may need to change the SecureBoot settings for MemTest86 to boot. When booting, you need to hold down the ALT / Option key on the Mac keyboard while powering on the machine to boot from USB. The consequence of picking the wrong drive are potentially disastrous, such as total and complete data loss from your hard drive. **FINAL WARNING** Make sure that the device used in the dd command above is correct. **WARNING** All data on the USB key will be lost is the file path for the input image file. dev/disk2) not a partition designation (ie. is the device the USB key is assigned to. In the example above the device name is /dev/disk2Īs the root user, use the 'dd' command to write the image to the USB drive. The first thing to do is, download the Etcher APP from their website. In the example above the device name is /dev/sdb Etcher is popular third-party software that can be used to burn ISO files to USB drives on Mac quickly. Unmount all volumes on the USB drive by typing the following command: Choose the USB drive you plan to burn ISO files onto and then Next to continue. In this window, it will automatically search for all inserted USB drives. dev/sdb Lexar JumpDrive 15G disk AASNGKKA04EW2GXD Open Control Panel on your computer, and search Windows ToGo in that window. dev/sda VMware, VMware_Virtual_S 80G disk Lsblk -p -o NAME,VENDOR,MODEL,SIZE,TYPE,SERIAL Double-check to make sure you have the correct drive. **WARNING** The contents will be overwritten in the next steps.ĭetermine which device the USB drive is assigned as by opening the Terminal and typing the following command. Works for everyone whether you are on Windows, Linux or Mac with no complicated install instructions. Insert a USB flash drive into a USB slot. ![]() For the free edition of MemTest86, this file is called, memtest86-usb.img Inside the Zip there is a "disk image" file. Download the current Memtest86 package as a Zip file from this page.Creating a MemTest86 bootable USB Flash drive in Linux/Mac
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