I am not a Mac user - but from the discussions in the forum it is pretty obvious that the support for PC & Linux
users is better than for Mac users.
The support for plug-ins are also generally not as good for Mac.
The reason is lack of equipment
to develop on and developers on Mac in general.
I don't mean to dismiss Mac at all, but if one purpose of a new computer is to run OpenCPN
I would suggest a PC or Linux
based system instead of a Mac.