Quick-fire questions

What to do with a warning in Disk Utility?

> Warnings aren’t errors, and can arise in APFS for trivial reasons, most commonly a volume created with a different version of the file system. Unfortunately, these warning messages are seldom meaningful or informative. If it doesn’t make any sense, contact Apple Support.

How to put two apps into Split Screen mode?

> Bring the first window to the front. Hover the pointer over the green button at the top left of that window until a floating menu appears, and pick whether to put that window to the left or right. With that in place, click on the other window you want and they’ll be shown in Split Screen mode until restored with Escape.