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Apple suggests that you should have 8GB of free space on your Mac's drive before you install a major mac OS update, but we recommend aiming for 15GB to 20GB.

If you want you can jump right in and download High Sierra as soon as Apple makes the new operating system available. However, we'd advise you to hang on and let others discover if there are any issues with the new software before you install it.

High Sierra, which is the latest version of mac OS, appeared on the Mac App Store on 25 September 2017.

And even if there are no issues often Apple's servers get overloaded as everyone rushes to update and that can really slow the process down.

So we recommend you hold your horses and do some tidying up and preparation first.

The version you will download from the Mac App Store will be an older version than the latest update.

Because multiple updates to High Sierra have been issued by Apple since it launched in September 2017, you should expect to have to update the operating system again once you have installed it, but this should happen automatically.

It's not just Apple developers who get to try out the new software - if you would like to be a public beta tester your can find out more about that scheme here: How to get the latest Mac OS beta.

If you'd like to find out a bit more about mac OS High Sierra before downloading it, read our comparison ofmac OS Sierra vs High Sierra to find out how it compares to the previous version. Following WWDC in June Apple issued a beta of High Sierra - we expect that the same will happen with mac OS 10.14.

Updating your Mac to the latest version of the Mac operating system is really easy, free, and not nearly as time consuming as it used to be.

However, there are a few things we recommend you do first to ensure things go smoothly, we run through these, as well as instructions for downloading and installing the latest version of the Mac OS in this tutorial.

If you have less than 4GB RAM it is definately time to consider upgrading to a new Mac, or installing more RAM – if you decide to do that, make sure that the RAM you choose is compatible. You may be concerned that you have some software that you need to use that may not work in the new operating system - the apps in Microsoft Office 2011 won't work, for example!


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