

If you want to start over and wipe out the data, you need to go into Disk Utility to reformat the internal drive first, and then install macOS Sierra. If you want to install Sierra and leave the data intact, select Install OS X.

(In the Terminal command you will use, I use Untitled to represent your external drive. Connect the external drive to your Mac.If your really don’t want to use Terminal, there are a couple of free apps you can use. The process detailed below involves the Terminal. Change the name of your drive to Untitled you need to do this for the steps below. The drive will be reformatted automatically as part of the process. I’ve used different drives with success, including a VisionTek 120GB USB 3.0 Pocket Solid State Drive ($83 on Amazon) and an old 8GB Iomega Micro Mini Hard Drive.ĭon’t worry if the drive isn’t formatted for the Mac. You can use a USB flash drive or a hard drive with room for the installer software.
FORMAT A FLASH DRIVE FOR MAC SIERRA UPDATE
Offline Xbox update worked like a charm via USB stick. That allowed me to format a USB drive as NTFS with full read-write access and then write the system update files to the USB drive. Installed the Paragon NTFS for Mac using 10 day trial. If it automatically launches after download, quit the installer. I needed to perform an offline system update for Xbox One S but I only have Macs. Look for macOS Sierra in the list of apps that you’ve bought, and click on the Download button. You can download it again if you go to Purchased in the App Store. If you’ve already upgraded your Mac to Sierra, the installer is removed from the Applications folder. Keep the installer in the Applications folder.
