It only rely on steam cloud sync as the game is only available through steam which also makes it work accros PC and Mac
Talk:Rocksmith 2014
I have no clue how the page should be styled, so here is something that someone should add: http://forums.ubi.com/showthread.php/719817-A-guide-to-achieving-low-latency-in-Rocksmith-on-PC-Forums
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