Welcome to the forum, Sam (even if you've been here since April 2014)!
These might help ...
For myself, I wouldnt ever try to use a Mac for trading.
I think almost all the people I know who do, also use a software thing called "Parallels" to be able to make everything they need Windows-compatible, and for myself I've never really seen the point of paying extra for a Mac and then paying extra again for special software to make it think it's a PC. Seems like something to avoid, to me, but what do I know?
Personally, I recommend avoiding internet "information", generally, because there's so little quality control of what's published online, and a lot of it is published with a view to or as part of promotion/marketing; I know a lot of it's very unreliable and inaccurate, and when you're new it's understandably close to impossible to differentiate between "information" and "misinformation".
Also, one needs to bear in mind that in a field of endeavour at which so very few participants ever really achieve any success, the "general consensus of opinion" about many of the issues involved is pretty likely to be a fairly misguided one, so it's obviously particularly easy to end up inadvertently "copying losers" rather than "copying winners", if you rely on "what most people online are saying".
I think these very big and very common problems are to a large extent easily circumvented by sticking to reading well-recommended, well-established, mainstream, orthodox trading textbooks, published by well-recommended, well-established, mainstream, orthodox publishers (i.e. all of it "peer-reviewed" and "quality controlled", before it ever saw the light of day) and avoiding internet "information".