![]() ![]() Command-Option-R upgrades to the latest version of macOS that’s compatible with your Mac.Command-R reinstalls the latest version of macOS that was installed on your Mac.The keys you hold down to get into Recovery determine which version of macOS you’ll get: Then boot into macOS Recovery and install the desired version of macOS on your new volume. We recommend naming the drive such that it will be clear what’s on it. Next, in Disk Utility, select your internal drive, choose Edit > Add APFS Volume, and click Add. The only problem with this approach is that you’ll have to restart to switch operating systems, whereas both are available simultaneously with the virtualization solution.įirst, make sure you have at least one current backup of your Mac, since it’s foolhardy to adjust your drive structure without one. It’s easy, and Apple provides full instructions. You can create an APFS volume on your internal drive and install another version of macOS on that. Install Catalina and Mojave on Separate APFS Volumes and Switch Bootįinally, there’s one other option that lets you switch back and forth between Mojave and Catalina, assuming your Mac supports Mojave. This approach is also perfect for a 16-inch MacBook Pro or Mac Pro that can’t run Mojave in any other way. These apps cost about $80, and while there’s a bit of work in setting them up (the screenshot below shows the option for installing Mojave in Parallels Desktop during setup), once you have them configured, it’s easy to run older apps alongside newer ones with little or no performance hit. In essence, they fool the guest operating system, whether it’s Mojave or Windows, into thinking it’s running normally on a computer, when it’s actually running in a virtual environment. Both apps let you run nearly any operating system-including older versions of macOS like Mojave-in a virtual machine. So if you’re ready to upgrade to Catalina in general but need to maintain access to one or two apps, one solution is virtualization software: either Parallels Desktop or VMware Fusion. Sure, you can get a current version of Quicken, but it may not do precisely what you want, and Fujitsu would be happy to sell you a new ScanSnap scanner that does come with 64-bit software, but then you’ll have to figure out what to do with your old scanner. Quicken 2007 falls into this category, as does the ScanSnap Manager app for the ScanSnap S1300, S1500, and S1500M scanners. Use Virtualization to Keep 32-bit Apps Runningįor some people, what’s keeping them on Mojave is a single 32-bit app that will never be updated in an appropriate fashion. Once you’ve booted from your Mojave Installer drive, use Disk Utility to erase the entire internal drive. To use that drive to boot a Mac with a T2 security chip, you must allow external booting from the Security Utility on the Recovery partition. First, you create a Mojave Installer USB drive. System engineer Armin Briegel has worked out a way of downgrading new Macs to Mojave. This could be the case for someone who has purchased a new Mac that does support Mojave but came with Catalina installed, for someone who wants to test Catalina while still using Mojave, or for someone who wants to move on to Catalina but has a 32-bit app that they aren’t ready to say good-bye to.ĭowngrade from Catalina to Mojave on Some New MacsĪpple has started installing Catalina on new Macs other than the 16-inch MacBook Pro and 2019 Mac Pro, but since these older Macs can still run Mojave, it’s possible-if a bit tricky-to downgrade them to Mojave. If you are ready to try Catalina but still want to use 10.14 Mojave, we have some advice for how to make that happen. And Apple has shipped several updates that bring Catalina to version 10.15.3, addressing most of the complaints users had with the initial release. We’ve all had several months to come to terms with the fact that old 32-bit apps won’t even launch in Catalina. Most backup software now works with Catalina’s bifurcated drive approach that puts the system on a separate, read-only volume from your data and apps. That’s because the new 16-inch MacBook Pro and the 2019 Mac Pro that Apple released late last year ship with Catalina installed and can’t run any previous version of macOS.īut for most people, it’s time to consider an upgrade to Catalina. For some Mac users, macOS 10.15 Catalina is no longer a choice.
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