I use Collector Assistant on my Mac by using the Boot Camp feature. It works fine although you have to restart the computer to switch between the Mac and Windows. It's my understanding that CA's Mac version does not support chip collecting. Not sure why..... I think it has to do with the databases. If you've used CA's PacknGo feature then you can transfer both the program, user settings and your collection data onto another Windows machine and shouldn't have to purchase the CA software twice.