macOS Catalina Upgrade Bricking Older Macs<img style="float: left; margin-right: 10px" src="
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There are limited reports from Mac owners of the macOS Catalina upgrade bricking their Mac for good. The issue is happening due to the Catalina upgrade corrupting the EFI firmware of these Macs which makes any possible recovery difficult.
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macOS Catalina Upgrade Bricking Older Macs
