![]() This architectural change forced backup apps that make bootable duplicates to jump through hoops, since they couldn’t just read and write data anymore. The System volume is also read-only, so malicious software cannot modify the operating system, whereas the Data volume that contains your files remains read-write so you can install apps and create and modify documents. The two volumes appear as a single entity in the Finder and wherever you might select or navigate files. A System volume holds all the files macOS needs to operate, while the Data volume contains only your data. In 10.15 Catalina, Apple introduced APFS volume groups, a way of bundling separate volumes together to create a bootable macOS. Why Bootable Duplicates Have Become Difficult to Make And once we’ve done that, we can reassess the role of a bootable duplicate in a modern backup strategy. To understand why this seemingly simple task-just read all the data from one drive and write it to another-is causing such consternation, we need to step back briefly. That’s the complexity of creating a bootable duplicate of your startup volume, also known as a clone. However, there is one general concern that has caused us to hesitate to recommend upgrading. Is it time to upgrade to macOS 11 Big Sur? I’ll write more about that soon. ![]() The Role of Bootable Duplicates in a Modern Backup Strategy #1616: Explaining passkeys, Apple challenges for senior citizens, macOS 11.6.7 Big Sur fixes email attachment bug.#1617: Pages regains mail merge, HomeKit sensor improvements, keyboard flags in Monterey.Preview selections, portable power for a MacBook Pro #1618: M2 MacBook Air available to order, Lockdown Mode, Live Text vs. ![]() #1619: Stage Manager first impressions, Live Text in Preview redux, SMS 2FA failure fix, moving large folders with ChronoSync.#1620: OS updates, AssistiveTouch for iOS shortcut palette, Photos album sharing bug.
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