![]() ![]() If there are still problems try installing Catalina in Safe Mode. Create the Bootable Installer You’ll need a USB flash drive with a minimum of 8 GB of storage space and preferably, but not a requirement, a USB 3.0 port. You can change the T-2 Security Chip settings from the Recovery utility. If you can connect your mac to your router via cable rather than rely on Wifi, just in case the mac is calling home. How to Clean Install macOS Catalina Follow the instructions in the T2-Equipped Macs section. Restart normally to boot back in 'normal' mode and try the install again. If you get any errors run again until you get the green tick. If you were running an older version of Catalina and install the Combo it would take you to 10.15.4.Ĭan you boot to your Recovery HD, restart your mac and press and hold down the Command and R keys, the mac will boot to your Recovery HD, you should see a Utilities panel and click on Disk Utility, press continue and run Disk Utility> First Aid on your Macintosh HD. I take it you downloaded Catalina recently, therefore the version of Catalina that would be installed would give you the latest version which is 10.15.4. The advice about the Combo was wrong you can only install any Catalina Combo update if you have already installed a ![]()
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