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Catalina

Living the bifurcated life in macOS Catalina

If you're a macOS Catalina user, and a user of Terminal for various tasks, you might be surprised at how some things work—or rather, don't work, in Catalina. As a first example, consider the Utilities folder…on the left is how it appears in Finder, and on the right, the contents of that same folder listed in Terminal:

While Finder shows a full Utilities folder, Terminal shows it as empty. Why? If you're somewhat familiar with the technical side of macOS Catalina, you probably know the answer: Apple has separated much of the OS and placed it on a read-only volume.

Apple's "About the read-only system volume in macOS Catalina" page explains things fairly well—basically, what you see as one Utilities folder in Finder is really two things: A read-only Utilities folder, and a user-writable Utilities folder. (If my machine had any user-installed apps in the Utilities folder, they would have shown up in the Terminal output above.)

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How to fix Split View in macOS Mojave and Catalina

macOS has had (since 10.14) a built-in Split View mode that lets you use your full screen to display two apps side by side, each in a quasi "full screen" mode. Personally, I never use this feature—why limit yourself to just two windows?—but I know many people do.

In macOS Catalina, you activate Split View via a green button hover, which then shows this pop-up menu:

The activation method is somewhat different in 10.14, but the end result is the same—a window taking up half your display. Except when it doesn't…

As you can see, the full screen menu item works, but the two Split View entries do nothing at all—no error message, but nothing happens other than the menu vanishes.

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Install macOS 10.15 Catalina in a Fusion virtual machine

While I have older hardware (a 2013 MacBook Pro) that I use for testing macOS betas—it's now running Catalina—it's often handy to have the latest macOS beta running in VMware Fusion on my iMac. With past OS releases, this has been a relatively easy process. With Catalina, however, attempting the install results in a black screen.

Thankfully, some enterprising Fusion users (Bogdam and intel008) have figured out a workaround. I tried it, and while it did work for me, I had to change the instructions just a bit (read on for the details).

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