My recommendations for Mac Users:

* Put the Dock left or right, vertical space is precious (trust me, do it for a week and then decide)

* Setup Hot-Corners (Settings -> Mission Control -> Hot Corners)

   - Upper-Right Corner as Mission Control (Must be upper right so spaces are immediately shown)

   - Lower-Left Corner as Application Windows

   - just fling your mouse curser into the corner (use std. gestures on the trackpad)

This makes window management a lot better.

* Maximise Windows by double clicking the Window title bar.

* Disable auto-{correction, capitalize, etc}, smart-quotes under Keyboard settings (if you want)

* Learn about the screenshot shortcuts CMD+shift+{3,4}, 3: full screen, 4: select area or switch to window select with hitting space bar once.

* Learn about CMD+space for launching apps

* Set Key-Repeat to fast and shorten the delay

* Disable spotlight for everything except what you want to use it for.

* Enable File-Vault

* Disable "Wake for Network Access" under Energy

* Enable the ssh server under Sharing "Remote Login" (If you want)

* Disable the visual/audible bell in the Terminal profile.

* Install MacPorts/Homebew

And one thing to internalize is that Apple is a little authoritarian about some UX aspects.

For example the snapping and window thing... Apple has a thing with continuos freedom opposed to the discretisation one is used to. I've come around to that view as well actually, free your mind, nature is not a stepped slider.

Cool Utilities:

MenuMeters with a CPU usage graph. this allows you to see if something is killing your battery.

MonitorControl (on github) to set brightness of external monitors.

LittleSnitch ($$) for fellow paranoid control freaks

IINA (github) best video player

UTM for VMs (free on github) paid options are good too

MacPass for KeePass databases

Hope it helps.