Updating Parallels can lead to a broken Parallels installation and an error message "Unable to start Parallels services." Here's the fix.
The Mac's Calculator app does more than basic math. It knows trigonometry, square roots, exponents, natural logs, scientific notation, etc.!
Here's how you can solve the "my Mac is not synching with iCloud" problem. If you see a spinner in Calendar that never stops, you need this.
The Mac's System Preferences has zillions of settings. Here's how you find the one you want, using the built-in Search feature.
Here's how you rearrange the order of the icons in your Mac's menubar. Works for every modern version of the macOS.
Installing Sierra or High Sierra or Mojave on a Mac? Seeing a message that your installer is damaged? The message is wrong. Here's the fix.
The latest Mac OS is 10.15.4 (Catalina), released Tuesday, March 24th, 2020. A supplemental 10.15.4 update was released Wednesday, April 8th, 2020 addressing a FaceTime bug, an Office 365 sign-in bug, and a lot more. The supplemental update is highly recommended. (Remember that upgrading to Catalina from any other macOS is a big deal, and you should be sure that your apps are ready for it.) See this article for information about compatibility with 10.15.
macOS Catalina (10.15) requires 64-bit apps. Here's a quick way to check your apps and get a list of those that are not 64-bit.
It's great that you set up a Time Machine backup. But is it working? Find out now. Here are two ways to check.