Hi hwffm,
Changing computers can be a hassle but QuickBooks Desktop makes it a little easier by allowing you to install on more than one at a time. I can help go over this with you.
At this time QuickBooks Desktop Canada doesn't have Mac functionality as it requires windows components to run properly. There is a work around for this though. You can install a windows partition on the Mac computer and install your QuickBooks Desktop that way. You can find out more about this here. I do suggest having an IT professional assist with this to make sure there are no issues.
Another option would be to look into QuickBooks Online as it is compatible with any operating system and can be used anywhere you have internet connection. You can look at the features and pricing here.
Hope this helps!