I dive into LaTex world for a time, although I try my best to read More Math Into LaTeX come along with TeXShop, there are still lots of gaps uncovered.
I did search them on Lynda.com and I find nothing, so, any LaTeX video tutorial recommendations for Mac Users?
Best Answer
[Summarising comments]
While you may find some resources recorded on a Mac, the vast majority of material will not make specific reference to any one platform. Most people writing guides, etc. very deliberately avoid most platform specific stuff. With the exception of actually installation TeX system, the same on Windows/Mac/Linux/... If you use a cross-platform editor (of which there are many: see LaTeX Editors/IDEs).
Videos are useful for some aspects of learning LaTeX, but as it's a programming-like approach more 'traditional' resources such as books or written online guides are often more useful: see What are good learning resources for a LaTeX beginner? for some examples.