If you're told that your Mac was unable to communicate with your Apple Watch, try the fixes in this article and you should be able to resolve this issue easily.
The command line "chflags hidden" is used to hide files and folders in macOS. You can use the Comand-Shift-. keyboard combination to show the hidden files and folders.
Both Windows and Mac have the built-in screen capture tools, however, those built-in tools are not powerful enough for the technical writers or bloggers who need to write how-to guides. For technical writers or bloggers, they deserve a versatile screen capture tool:Snagit!