![]() ![]() Let’s kick off the install process with the method most likely to be used: the upgrade install. Last but not least, a copy of the beta macOS Mojave installer app, available through the Apple Developer Program or the Apple Beta Software Program.You can use Carbon Copy Cloner, SuperDuper, or even Disk Utility for this function. For an upgrade install, you’ll also need a cloning app to create a copy of the startup drive.This can be an external or internal volume, and will eventually house the Mojave beta. You need a volume with enough space to hold a clone of your current startup disk (upgrade install), or enough free space for a clean install of the Mojave beta (40 GB or larger is adequate for beta testing space).One last reminder: before you install, make sure you have current backups. Instead of targeting the startup drive for the install, this guide assumes you’ll be installing on an external drive, a second internal drive, or possibly a volume contained on a drive you partitioned. If we were, the clean install process would be quite different, with a number of additional steps, including creating a bootable Mojave installer, starting up from the bootable installer, and erasing the startup drive. This is because, for a beta install, we’re not targeting your Mac’s startup drive for a clean installation. The upgrade and clean install processes are, remarkably, the same for installing the beta of macOS Mojave. Using the clean install method on an empty external drive is a better option.īefore using any of the install methods outlined here, be sure to start the process by making sure you have a current backup of your startup drive, as well as any other drives that contain important information you can’t afford to be without. I don’t recommend using this install method on your Mac’s normal startup drive since you would lose all your current data. It can completely erase the destination volume and then install a fresh copy of the Mojave beta. Clean Install: This install process creates a pristine copy of the macOS Mojave beta on a target drive.This will leave your current system intact and usable for your normal daily tasks, and still allow you to test and try out the beta on a different drive, one that contains copies of all your apps and data. ![]() ![]() Because the upgrade install of the beta is an all-or-nothing process, I recommend that you install the beta on a copy/clone of your current startup disk. It will also update all of your Apple apps to the beta Mojave versions, and may also update the document formats of some apps. It will upgrade your current version of the macOS to the beta version of Mojave.
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