![]() You may take a hit in terms of performance, you may need to leave System Integrity Protection in a lowered state (or disable it altogether), and the process may take much longer than expected. You’ll need to download an installer, create a bootable USB drive, patch the drive to enable support for your Mac, and see the installation process through. If you're currently running macOS Mojave, click this link to find the Mojave installer in the App Store. Search for your USB flash drive under the External section. Step 3: Open Finder Applications and right-click on Install macOS 10.14 Beta and select Show Package Contents. On the left side, you can see a list of all drives. Type Disk Utility in the search field and click it to open. 3) Select the drive called Install macOS Mojave Beta from the Startup Manager using the keyboard arrow keys. Here’s how to prepare your flash drive for creating a bootable macOS installer: Head to Launchpad from the Dock. Agree to the terms and conditions, then select your Mac’s internal drive. Click Continue, then click Continue again when the next window appears. When the macOS Utilities screen appears, follow these steps: Select Reinstall a new copy of macOS. 2) Start up the computer whilst holding the Option () key. Take your bootable USB and connect it to your Mac. ![]() Installing an unsupported version of macOS on your Mac takes a decent amount of work the process is more involved than the usual macOS installation upgrade process. How to use the macOS Mojave USB installer 1) Shut down your Mac with the USB drive inserted. Here’s how to do it and some things to keep in mind if you go this route. Has Apple ended support for your Mac? You can install new versions of macOS anyway by creating your own patched installed. Install macOS as usual and then finish up the installation by installing OpenCore on your internal drive and running any necessary post-install patches. Big Sur 11 Catalina 10.15 Mojave 10.14 High Sierra 10.13 Click the link to open the App Store page for that macOS. Next, install OpenCore to the USB drive and boot your Mac using the drive. Pull down the Tools menu and choose Download macOS Mojave Confirm that you want to download the full 6. To install an unsupported version of macOS on your Mac, first download OpenCore Legacy Patcher and use it to create installation media for your chosen macOS version.
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