Definitely no problems with this site, using Safari and OS X.
Every once in a while I do run into some site that won't work properly, but this is pretty rare now, much less frequent than a few years ago. Currently, I can't fully access one of my retirement accounts, but don't remember running into any other problems in many months.
Macs are great, and OS X keeps getting better and better. As a software developer working from home, mine gets quite a workout, but the last time I rebooted was over 90 days ago - and that only because I was installing updates.
But I like your priorities - if I couldn't access the club, that would be grounds for a new computer!
-Bob