9/18/2020 Mac Os High Sierra Partition Software
Jan 03, 2018 Part 2: Partition USB drive macOS High Sierra. If your USB drive is formatted as GUID Partition Map, the Partition button should now no longer be greyed out. Select your drive in the sidebar (A) and click Partition (B). In the window that opens, use the + and -buttons in the lower left corner (C) to add and remove partitions.
Time required: < 10 minutes
![]() Mac Os High Sierra Disk Utility Partition Greyed Out![]()
To partition USB drive macOS High Sierra can be a useful way to organize your data on an external hard drive. Problem is, most USB keys and external hard drives come formatted for Microsoft Windows and have what’s called a Master Boot Record. By default, you can’t view the options to enable you to change this in macOS’s Disk Utility to be able to change it to the standard GUID partition: this is what allows you to create partitions on a USB drive or external hard drive.
Typically the Partition button will be greyed out, and on hover the following message will be displayed: “Disks with master boot record cannot be partitioned.”
Fear not, however, for we have found the solution:
In Disk Utility, Select View and tick Show All Devices. This unhides the containers where you can select to Erase (format) a drive with a GUID Partition table. Follow along for the full guide on how to partition a USB drive in macOS High Sierra.
Partition USB Drive macOS High Sierra
Things you will need:
WARNING: This process will have you format the USB drive or external hard drive, which means you’ll lose all existing information on that drive. Triple-check that there’s no data on the drive that you want to save, if there is, you will have to move it somewhere else before you continue. You’ve been warned.
Part 1: Prepare USB Drive
If your drive is already formatted as GUID Partition Map and you can see containers in the sidebar, you can skip to Part 2: Partition USB Drive.
Part 2: Partition USB drive macOS High Sierra
If your USB drive is formatted as GUID Partition Map, the Partition button should now no longer be greyed out.
Were you able to partition USB drive macOS High Sierra?
Mac Os High Sierra Update
164198
Mac Os High Sierra 10.13.6
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