I’m not sure how the “race” upgrade condition could happen? The Catalina Patcher tool downloads the latest full version of Catalina offered by Apple (19H2) and then offers you the option to create an external bootable installer. Otherwise both the update to Mojave and the upgrade to Catalina will race each other to install and the upgrade will fail. Let us know how it one does that, first must make sure that the version of macOS (le’s say Mojave” is fully updated before upgrading (let’s say, to Catalina). After you install updates you may need to re-run the rEFInd-install script.īest of luck.Using the minus sign (-) allows you hide boot options in the rEFInd menu screen.Create and keep a separate USB flash drive created via the Catalina patcher tool that contains the macOS installation files along with the post install patches.The first screen takes 10 minutes to move on to the next step.

I thought the machine was hanging on the first screen, the progress bar was full and it appeared that nothing was happening. If updating to Catalina, let the CatalinaOTAswufix run.Using the refind-install script from the binary zip file should be all you need. However, I’ve found that installing rEFInd via a Linux session works just as well. The proper installation is demonstrated by this youtube video: rEFInd: How to Install and Boot Alternative OS on Mac. The file you want is the binary zip file found on the getting rEFInd from Sourceforge page via the rodsbooks website. The Catalina Patcher will allow the creation of install media (19H2) and the CatalinaOTAswufix will allow update to the latest version (19H524) after installation. Thread from macrumors: Catalina on Unsupported Macs.Links to run macOS Catalina on your Unsupported Mac: If you are going to dual boot / repartition you might as well bring that unsupported macBook up to a currently supported OS.

Personally I would not dual boot and just run Linux on that old mac but…

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