Booting a mac pro 2007 to a thumb drive zip file#
Booting a mac pro 2007 to a thumb drive zip#

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. The bootable installer thumb drive will not appear in the list of Startup Disks using System preferences if the date is set past October 23 2019. a machine that will start the installation cd or usb and then ask for the 4 digit. I speak specifically about installer thumb drives 10.12.x 10.14.x. written to the motherboard boot ROM on Apples MacBook (EFI). **FINAL WARNING** Make sure that the device used in the dd command above is correct. Installer thumb drives will Not appear when you use option+boot if the date is set past Octoon Nehalem Mac Pros.

**WARNING** All data on the USB key will be lost is the file path for the input image file. If you’re impatient, just select it yourself with the arrow keys and hit enter. At first, you’ll see your boot drive shown on the screen just sit back as OpenCore will automatically select your boot drive in a few seconds and continue the startup process. dev/disk2) not a partition designation (ie. Restart your Mac If you could not see a boot screen before, you should see one now.

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. In the example above the device name is /dev/sdb Boot the Mac in recovery mode, by holding CMD-r 2. If the SSD is already built into the Mac: 1. There is a risk of data loss if you dont. Unmount all volumes on the USB drive by typing the following command: Answer (1 of 7): Warning: this answer assumes you sort of know what you are doing. dev/sdb Lexar JumpDrive 15G disk AASNGKKA04EW2GXD 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. Insert a USB flash drive into a USB slot. For the free edition of MemTest86, this file is called, memtest86-usb.img

Booting a mac pro 2007 to a thumb drive zip#

Inside the Zip there is a 'disk image' file.

Booting a mac pro 2007 to a thumb drive zip file#

Download the current Memtest86 package as a Zip file from this page.

Creating a MemTest86 bootable USB Flash drive in Linux/Mac