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Is it possible to convert HFS to APFS in Catalina?
Yes Catalina wants to see apfs. you can convert your HFS+ to apfs on the fly— it requires you to be booted into Recovery. Recovery Mode. Restart your Mac and press-hold Command + R to boot into recovery mode. Then, from Disk Utility>View>Show All Devices> Select your parent drive> click Edit > Convert to APFS.
Can a macOS be installed on a separate APFS volume?
Yes, this is definitely possible. I just created this exact setup with macOS Catalina (10.15.1) as the “main” OS, and a separate macOS Mojave (10.14.6) installation in an APFS Volume (same disk, same container). Click on this link which will open the Mac App Store on the Mojave page.
Can you install Mojave on the same volume as Catalina?
Yes you can, provided your macOS installer is not in the same volume where you want to install macOS too. Let’s assume you have two hard disks or partitions named Catalina and Mojave respectively.
How do I install Catalina on my Mac?
It will take a while for Catalina to be written to the flash drive as a bootable installer. Once done, restart the Mac and immediately hold down the Option key. Choose the flash drive as the startup volume. When it gets to the work screen, run Disk Utility from the top menu bar.
How many APFS volumes are there in Catalina?
A volume group can have multiple volumes that appear as a single volume to both the system and the user. In addition, APFS volumes under Catalina can have 16 unique roles, including System and Data. System volume: This read-only volume contains all the operating system files that should never change during use of your computer.
Is there a way to restore Catalina from HFS?
While as you know, restoring a Catalina BaseSystem.dmg (it’s still in HFS) does work as a kind of “HFS Recovery HD”. I had the same behaviour when just copying the contents of /System/Library/Templates/Data to /.
Why does the macOS Catalina installer split data and?
In other words, Catalina protects the OS in its own read-only volume. The Catalina installer renames the startup volume to “Macintosh HD – Data” (assuming your boot volume has the default title “Macintosh HD”) and assigns it the Data role. The installer also creates a brand new volume with the System role.