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If your Seagate external hard drive not showing up Mac Sierra, try restarting it with the help of the steps mentioned right below. Hit on the 'Apple' icon available on the top left corner of your Mac screen and then opt for the 'Restart' option from the appearing drop down menu. Fix The Seagate. Mar 17, 2018 4. The Seagate physical drive was shown with my previous attempts at partitioning grayed out below. I clicked on the physical drive (NOT the drive partitions below!) and selected 'Erase' (NOT 'Partition'!) from the tabs above. I just allowed Disk Utility to select the drive format.
Format Seagate External
This article explains about file systems and provides instruction to format a drive on Windows and Mac. Newer Seagate and LaCie branded external drives come preformatted exFAT, some older drives are formatted for PCs, some for Macs, and some of them have special utilities allowing them to work between both without formatting. Aug 04, 2017 But when I then tried Mac format, same thing happened. I'm thinking, maybe it's Sierra. I plug one of the drives into my old MacBook with Snow Leopard and the drives formatted. Well no because when I connected to my Sierra OS Mac, the same bloody thing happened when I tried a format. May 08, 2012 I just got two new 3TB seagate drives for my Mac Pro at work (4,1- Snow Leopard) that disk utility will not format. My steps: -Installed in drive bays 3 and 4 -reboot, get message that computer can't read drive, click initialize to open disk utility -choose erase tab, Mac OS Extended.
Erasing your disk: For most reasons to erase, including when reformatting a disk or selling, giving away, or trading in your Mac, you should erase your entire disk.
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Erasing a volume on your disk: In other cases, such as when your disk contains multiple volumes (or partitions) and you don't want to erase them all, you can erase specific volumes on the disk.
Erasing a disk or volume permanently deletes all of its files. Before continuing, make sure that you have a backup of any files that you want to keep.
How to erase your disk
How to erase a volume on your disk
Reasons to erase
You can erase at any time, including in circumstances such as these:
About APFS and Mac OS Extended
Disk Utility in macOS High Sierra or later can erase using either the newer APFS (Apple File System) format or the older Mac OS Extended format, and it automatically chooses a compatible format for you.
How to choose between APFS and Mac OS Extended
Disk Utility tries to detect the type of storage and show the appropriate format in the Format menu. If it can't, it chooses Mac OS Extended, which works with all versions of macOS. If you want to change the format, answer these questions:
How to identify the format currently in use
If you want to know which format is currently in use, use any of these methods:
How To Format Seagate For Mac
Seagate For Mac InstructionsIf your disk or volume doesn't appear, or the erase fails
Format Seagate Drive For MacLearn moreSeagate Driver For Mac
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