Most Macbook Repairs in Toronto offer a flat rate for OSX reinstallation. OSX reinstallation could take hours for end users but for shops it would take minutes. Most shops in Toronto offer more softwares when they are installing OSX for you which is why its worth it to do it with them. How ever you could still do this yourself.

If you happen to bring it to a shop to reinstall OSX, maybe its a good time to do an upgrade on your hard drive (from regular hard drive to an SSD super fast hard drives) and do a professional cleaning so you save money on all the services together. Remember, most shops offer discounts when you do more than one service at the time. It is always good to save money and time.