Apple Support on X: Photo Booth for Mac is a great app for selfies. You can keep your hands free, try out fun effects, and even use the screen flash for lighting.
How to Use Photo Booth on a Mac (with Pictures)
Change your login picture on Mac - Apple Support (KE)
How to Use Photo Booth on a Mac (with Pictures)
Use built-in help on your Mac - Apple Support (ZA)
Get tips on iPad - Apple Support
Photo Booth, Apple Wiki
Pages User Guide for Mac - Apple Support (GU)
Photo Booth, Apple Wiki
How To Turn On The Camera On a Mac
Photos User Guide for Mac - Apple Support (KW)
Pages User Guide for Mac - Apple Support (GU)
Print your own photos in Photos on Mac - Apple Support
macOS User Guide - Apple Support
Control access to the camera on Mac - Apple Support