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I have a MacBook Pro running OS X Lion (uses 100% of my Mac HD). I would like to play some Windows 7 games (e.g. Limbo, etc) but virtual machines are not good enough.

I wonder if it is possible to install Windows 7 in a USB stick (which minimal size?) and run from it, so that when the computer boots and detects the USB stick I can select between OS X and Windows 7, and more importantly, Windows 7 does not kill my OS X partition.

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why not install it on a VM – Shekhar Nov 1 '11 at 7:14
up vote 2 down vote accepted

If you have enough disk space, Boot Camp is the solution for you. You get the full use of your Mac's hardware, and a decent Windows 7 performance.

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my mac's HD is 100% dedicated to OSX. If I use bootcamp, do I need to reformat it completely or does bootcamp resize somehow the HD without loss of data? – flow Nov 1 '11 at 7:24
    
The Bootcamp wizard will help you create a partition on your main disk - if you have enough free space. It's fairly painless - and reversible (i.e., at any time in the future, you can cancel the dual boot and absorb the Windows partition space back into the Mc partition) – Traveling Tech Guy Nov 1 '11 at 7:40

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