How to Install new macOS Beta Safely on Separate Partition & High Sierra Performance Tests

In this video we'll be guiding you how to setup the latest macOS High Sierra beta. We'll be doing it on a separate partition which means you can still use your current version of macOS on the same computer, keeping you safe. But, also showing you how you can still access all the apps and documents from your current macOS from the new macOS High Sierra.

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First up we're going to create a small partition to install macOS High Sierra on. Now High Sierra takes up around 10GB, so you don't need to allocate much space for it. Partitioning takes around 5 minutes, with this video being sped up.

Second, you'll need to download the beta, you can do this by heading on to either the beta.apple.com or the developers.apple.com websites. Which will unlock the app in the App Store app for download.

Third, just launch the installer, but remember to select the new partition we just created to ensure you can still use your current macOS.

Fourth, wait around 20 minutes for the Mac to reset itself a few times.

Next, you just go through the standard setup procedure.

The beta has analytics and diagnostics reporting enabled by default, you can always disable this from the privacy option in System Preferences.

Now, we're going to enable access to your current version of macOS from High Sierra. To do this you need to head on to Disk Utility and unlock your main partition. If you've encrypted your drive using FileVault, you'll be prompted to input the encryption password for access.

Once that's done, in my experience I needed to restart my Mac to actually be able to access the drive.

All your apps and documents are now available to you in the new OS, just head to the Applications folder in your main partition and launch. If you haven't restored from a backup, all your app specific settings will need to be re-configured. If you do TimeMachine backup your mac, all will be good in the world.

To switch between High Sierra and Sierra, you can do this from either the Startup Disk option in System Preferences. Or when resetting your Mac, hold the alt key and select the partition to boot with.

Of course this is still a beta version of the operating system, so performance will improve, but for now I find that exporting a video using Final Cut Pro is around 10% slower in High Sierra when compared to Sierra.

Any problems or questions, just ask in the comments section below :)

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