
When installing macOS Catalina, choose your new disk as the install location.Erase your startup disk with Disk Utility and boot from the new one.On the disk, create a bootable installer.Connect a clean and reformatted external hard drive or a USB stick.Create a safe bootable backup of your disk with Get Backup Pro.Just make sure you don’t lose anything in the shuffle: Risky as it sounds, a clean install enables a healthier life for your macOS. In contrast to a regular install which puts macOS on top of your startup disk content, a clean installation cleans everything up. If you’re determined to give your Mac a new life, run a clean install of Catalina. Click the plus button to split your disk, name your partition, and customize the size if needed. Your disk will be the first on the list under “Internal.” Select the disc and navigate to Partition tab. To install Catalina on a partition, go to Applications > Utilities > Disk Utility. Basically, it allows to split your disk into two parts, so that your computer can run two operating systems at the same time. If you’re not ready to give up Mojave just yet, you can install Catalina on a partition. If required, verify the account by entering your system password or with Touch ID.Open the PKG file and agree to the installation.


In Catalina, you’ll have to limit your Mac to 64-bit applications only.

Mojave was the first macOS to stop admitting 32-bit apps to the App Store and the last to support them.

Sometimes the reason why you can’t upgrade lies on the surface: It’s not too different from what we had last year, but take a look anyway. As usual, there’s a limited number of Apple devices that support macOS 10.15. Your to-do list for the upcoming upgrade:Įnsure your device is compatible. Try free ✕ A few things before you switch to Catalina
