Do you want to take screenshots on a Mac, but without shadow around the window? Then you can disable this by using a terminal command. Since macOS Mojave you have to use a different command than under macOS High Sierra (more info).
Sidecar lets you extend your workspace by using your iPad as a second Mac display. All the ins and outs about SideCar are explained in this Apple document. Unfortunately not all Macs are compatible for this feature, but there is a workaround that might enable Sidecar. With the use of a terminal command you can use all Macs that can install macOS Catalina for side car. But be aware, it doesn’t always work, but it is worth trying.
You can display additional information on the loginscreen of macOS. After applying the command you can click on the clock in the upper right corner, toggle between clock, IP address, macOS version and computer name. The information will be displayed for only 60 seconds.
Mojave Dark Mode includes a new full Dark Mode. If this modes is to black for you, there is a possibility to reverse to the macOS High Sierra dark mode. The following procedure disables the full Mojave dark mode and only enables a dark menubar and dock just like macOS High Sierra.
Nothing is more annoying that Photos will opens automatically when you connect an iPhone, iPad or other devices to your Mac. Use the following command in Terminal to change this and prevent Photos from opening automatically.
Did you know you can add the Quit option to the Finder’s application menu? This allows you to easily quit the application. After quitting you can restart Finder by clicking on the Finder icon in the Dock.