Hi, i'm not trying to spam links, but here are a few great youtube users who do videos on mac app reviews, tutorials, unboxings, etc check them out
YouTube - iTalkApple's Channel
YouTube - iAppleGeek1's Channel
YouTube - jon4lakers's Channel

None of these are me so please don't spam on their channels just wanted more people to know about them. Subscribe to their content so you know when they make new videos

If you know any good mac tutorials channels on youtube post below