While there are several portions of macOS and other third-party shortcuts
for use with Apple software (ios + mac) ~ general support articles do well.
Mac keyboard shortcuts - Apple Support
//support.apple.com/en-us/102650
This link opens to show many others for macOS, beyond one sitting's worth.
[Most every professional software for macOS also has their own shortcuts.]
Another place to look I know of, but won't elaborate now; Apple support help
documents are often grouped within User Guides, & have Table of Contents.
One example of these, mentioned is a Table of Contents; which shows other
portions in a structure. Mac User Guide (Table of Contents) - Apple Support
