Due to the large amount of electives being filled, I decided to take a full year course. However, I really want to take one psych course but this would result in 9 courses + the full year one. Would mac allow technically 11 courses ( 33 credits) in a year or no?

Engineering students can take up to 12 courses in a year so I'd think so. Double check with academic advisor and see if that is course overload but I would think not

Ask any Eng I student, they'd love 11.

The university will allow you to take 33 credits. Not sure what the cap is now for cost. It used to be somewhere around 30 units cap and anything else would be 'free'.
if you can manage it go for it.