Windows to mac

Former Member
Former Member
Hi,
I've got a Garmin etrex20 with 6 birdseye maps on my old windows 7 laptop. I've recently purchased a mac book and need to transfer my maps onto this. I've downloaded garmin maps onto the mac and I've managed to transfer my collection / routes onto the mac (via usb stick) but I'm struggling to understand how I can get my actual maps onto my mac?
Any advice would be greatly appreciated - I have very basic & limited I.T. knowledge so please keep it simple !!!