You don't "major in accounting" at McMaster. You get a BComm, and that's it. If you want to pursue a designation, look at the website for the institute which manages that designation.
CA -
www.guidetorulingthew orld.ca
To get your CA designation, you will need to be 2 courses ahead going into 4th year, and then you will have to take 3 advanced accounting electives in the summer after 4th year.
CMA -
www.cma-ontario.org
The CMA does not require the 3 advanced electives in your last summer. I believe it also doesn't require 4AF3 - Accounting Theory
CGA -
www.cga-ontario.org
I haven't really looked at these requirements. Happy reading!