This is a tutorial on taking measurements with Room EQ Wizard (REW) on MacOS. This is moves to the early part of AustinJerry's REW guide (currently ~ page 56). The measurement process is really the same between MacOS and Windows.
I highly recommend reading AustinJerry's guide completely. It contains detailed explanations of the different graph types, how to use them, and what to look for.
00:00 - Taking Measurements
03:15 - Setting Sweep Level
06:40 - Microphone Positioning
09:55 - Enable Acoustic Timing Reference
12:10 - Setting Graph Limits
16:30 - Graph Smoothing
Here are the links mentioned during the video:
REW - https://www.roomeqwizard.com
Enrico Claudio Guide - https://www.avsforum.com/threads/rew-for-macos-how-to-setup-your-mac-for-rew.3075106/
AustinJerry Guide - https://www.avsforum.com/threads/jerrys-images.2919306/page-7#post-60008826