Basic Basic questions about Traktor Pro

If I purchase traktor pro, can I install it both on my mac and my pc, or does that cost extra?

If I beat grid / set up Cues, etc. on Traktor Pro on the PC and want to then move those tracks to the mac, will they retain the meta data?

basically i am stuck carrying around a PC for work and would love to be able to use it to mark up my tracks, with the intent to move them to my PC for actual performance etc.

thanks a lot for your input!

You get two installs per purchase of TPro, so you can install on both.

As for crossing platforms, it should read the tags the same. Make sure you transfer the files regularly, but it should carry.