If you've always wanted to partition your Mac's hard drive so you can run a separate operating system — including — in tandem with your current one, it's surprisingly easy to do so thanks to Apple's built-in disk utility program. Here's how to partition your Mac. What is a disk partition? Partitioning your Mac is basically splitting your hard drive into separate, usable systems. It makes it possible to run two separate operating systems on one device, like Windows and macOS or two versions of macOS (like High Sierra and Mojave).

Note: If you want to run Windows on your Mac, Apple's Boot Camp assistant will automatically make a partition for you. It is important to note that partitioning your hard drive also splits up your available hard drive space. Each partition will take up a portion of your usable storage.

Oct 16, 2018 - Boot Camp helps you install Microsoft Windows on your Mac. Enough free disk space to create a Boot Camp disk partition* with a minimum. Possibly the best solution to using a hard drive with both Windows and Mac without the use of third-party software is creating two partitions on the drive, one for Windows and one for Mac.

So, if you are running low on storage capacity on your hard drive, we don't recommend partitioning; try using an external drive, instead. How to create a partition on your Mac • Open Finder from your dock. • Select Applications. • Scroll down and open the Utilities folder. • Double-click to open Disk Utility. • Select your hard drive in the Disk Utility window. It will be the first drive on the list.

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It might be named 'Fusion,' or 'Macintosh HD.' • Click on the Partition tab. • Click the plus (+) button. • Change the size of the partition you wish to use by dragging the resize controls.

The used space is represented in blue. • Name the new partition. • Click apply. Disk Utility will check the disk and make changes.

This will take several minutes. How to switch partitions You can switch to the new partition, install the current macOS, and then download and install macOS Mojave from there. • Click the Apple icon in the upper-left corner of your screen. • Select System Preferences.

From the drop-down menu. • Select Startup Disk.

• Click the Lock in the lower left corner of the window to unlock and make changes. • Enter your system admin password. • Select your partition drive. • Click Restart.

You can also restart your Mac and press the Option Key when you hear the startup chime. This will take you to the Startup Manager and you can select your drive from there. IfYou will then be asked to install macOS. This will install the latest available macOS onto the partitioned hard drive. You may have to install macOS High Sierra before upgrading to macOS Mojave. If you are testing a beta version of macOS, you'll first install whatever the current version is.

Then, you can then install the macOS beta. How to download macOS Mojave If macOS Mojave doesn't automatically install on your partitioned hard drive (if it installs macOS High Sierra instead, for example), you can open the Mac App Store to find and download Mojave from there.