Dennis Sellers

macOS Catalina’s Sidecar feature allows you to extend your Mac desktop by using your iPad as a second display or as an input device across creative Mac apps. This is how to easily get started!

macOS Catalina is 64-bit only. Apple has been phasing out 32-bit apps for years, and this operating system update takes the final step. You need to know which of your apps will work with Catalina and which ones don’t. To...

macOS Catalina brings Screen Time, a previous iOS-only feature, to the Mac. It creates usage reports that show you how much time is being spent on your computer, which apps are used most, and how many notifications are received.  With...

With  macOS Catalina, you can use your Apple Watch  to authenticate passwords or approve app installations when you double tap on the Side button. This is especially handy on Macs that don't have Touch ID, which is all desktop Macs,...

The new Gallery View in macOS Catalina’s Notes displays your notes as visual thumbnails, which makes it easier to find a specific note. The app also gets updated Share features. To see notes in Gallery View, launch Notes and go...

With macOS (Sierra and higher), Apple has provided a convenient — and fun — Picture in Picture (PiP) feature. You can “float” a video window from Safari or iTunes/Apple TV over your desktop or a full-screen app. You can see my...