

Regardless, you will have to erase the internal drive entirely before you can install Mojave due to Catalina’s bifurcated drive structure. It’s particularly fussy if your Mac is equipped with a T2 security chip since you have to set up an account before you can use Security Utility to enable booting from external drives. Unfortunately, the process to install Mojave isn’t straightforward, requiring a Mojave Installer USB drive.

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Mac scripting expert (and author of the new book Moving to zsh) Armin Briegel has published a guide explaining how to roll back a new Mac that ships with Catalina to Mojave. Luckily, downgrading a new Mac from Catalina to 10.14 Mojave is possible for models other than the 16-inch MacBook Pro and the 2019 Mac Pro. We’re still hesitant to recommend upgrading to Catalina, particularly if you use Mail, since reports of email data loss continue.

How to Downgrade a New Mac to Mojave from CatalinaĪs expected, Apple has started shipping new Macs with macOS 10.15 Catalina. #1605: OS updates with security and bug fixes, April Fools article retrospective, Audio Hijack 4, 5G home Internet.#1606: Apple's self-sabotaging App Store policies, edit Slack messages easily, WWDC 2022 dates.#1607: TidBITS 32nd anniversary, moving from 1Password to KeePass, pasting plain text, Mail fixes anchor links, RIP Eolake.#1608: How to test Internet responsiveness, Wordle takeoffs, understand cryptocurrency.#1609: Apple Q2 2022 results, Apple's Self Service Repair program launches, escaping the cloud with a Synology NAS.
