Format external drive for imac in mac os sierra

Format external drive for imac in mac os sierra install#
Format external drive for imac in mac os sierra download#

Format external drive for imac in mac os sierra download#

Bear in mindwhen you download an installer, the disk will be reformatted to suit the operating system youвЂ™re trying to run.

This article explains about file systems and provides instruction to format a drive on Windows and Mac. But in order for the computer and drive to communicate with one another, the drive has to be formatted with the correct file system.

Format external drive for imac in mac os sierra install#

Whichever type of drive you choose, make sure that it has at least 12GB of free memory. A drive can be used on any type of computer - PC or Mac. Put the macOS High Sierra installer on an external USB thumb drive or hard drive and use it to install the operating system on a Mac.

Shift+Alt+Cmd+R : For the internet reinstall but the problem still persists For your external disk to run macOS, you can choose as a USB flash drive, as well as an SSD or HDD.

Some external hard drives need to be plugged into an outlet to work. Connect an external hard drive to your Mac. Formatting your drive will wipe out all the data in it.

Cmd+R : For the normal reinstall but the problem still persists For the first time since Apple released OS X 10.8 Mountain Lion in July 2012, Apple has dropped support for a number of older Macs that had supported OS X 10.8 through 10.11 El Capitan. Note: If you already used your external hard drive on a PC, be sure to back up any files on it.

You already tried to partition the disk multiple times but it keeps erroring with the Error: -61 Follow the wizard to choose a volume size. I believe you followed the official guides and you tried to factory reset your Mac and you find yourself in this situation: the disk is locked and you cannot select it for re-installation Right-click on the external drives partition or unallocated space you want to format and choose New Simple Volume 4.