Hard-drive street atlas that can run on a Mac? Need help finding one to run on my 13" MacBook Pro

13" MacBook Pro; 160gig HD; 2g RAM; 2.25ghtz. Also have a 32gig iPhone 4. I am an Over-The-Road truck driver, only home every 2 weeks. Plan 2 upgrade to a 500gig HD, and want to get rid of Xp. Mac all the way!

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