Reader Bill emailed wondering about the safety of upgrading his iMacs to macOS High Sierra, since each has a Fusion Drive, Apple’s hybrid of SSD and hard drive. Jan 03, 2018  I then erased the fusion drive (HSF) and reinstalled the Yosemite from Internet Recovery. I then upgraded to High Sierra from the App Store. I planned to copy my files (1.5TB)from the backup to the new OS. I had started it up and came back to check the progress. As before, the process had slowed to a crawl (28 days to finish copying??). Apple's MacOS High Sierra update offers lots of behind-the-scenes changes that should make the Apple's desktop OS easy to use. High Sierra might disappoint. Mac with a hard-disk drive or hybrid. How to create a bootable macOS High Sierra installer drive 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. The script you could use with High Sierra doesn’t work with Mojave. Of course, if you’re installing on an SSD this isn’t a problem. But APSF doesn’t work well on a mechanical hard drive. Not right now, anyway. This isn’t an issue on a Fusion Drive (I hope), as APSF won’t install, though, supposedly, Mojave will.

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If you have previously partitioned your Mac's hard drive in order to download a macOS beta or install Windows, but now you need that storage space back, you can remove the partition and recapture the much-needed space. Here's how.

Macos High Sierra Fusion Drive

Getting rid of a secondary partition on the Mac is a two-step process. After erasing a partition, you can then remove it from your system.

Before you start

The most important thing to do before making any changes to your hard drive is to back it up. Time Machine has the easiest way to back up your data if you don't already have a system in place.

How to erase a partition on your Mac

Make sure to restart your computer in your main partition to erase additional ones.

1. Open Finder from your dock.

2. Select Applications.

3. Scroll down and open the Utilities folder.

4. Double-click to open Disk Utility.

5. Select the partition you wish to erase.
6. Click Erase.
7. Click Erase to confirm you wish to erase the partition.

8. Click Done to continue.

How to remove a partition on your Mac

After following the steps to erase a partition, you can then remove it from your hard drive.

1. Select your main partition, which is the first drive on the list. It might be called 'Fusion' or 'Macintosh HD.'

2. Click Partition.

3. Select the partition you wish to remove from the graph.
4. Click the minus (-) button.

5. Click Apply.

Disk Utility will check the disk and make changes. This will take several minutes.

Mac Os High Sierra Features

Any questions?

Do you have any questions about how to erase and remove a partition on your Mac? Let us know in the comments and we'll help you out.

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Mac Os High Sierra Dmg

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