The MBP mid-2011 QuadCore laptop that I use DOES run 64-bit software. Some of my older VI's, notably Native Instruments' Pro-53 will never be updated, and though the Arturia vi Prophet5 looks GREAT, I have so many patches in NI format that i'm loathe to rebuy. The reason that's okay with me is this: *** there's this Apple 32-bit plug-in software, part of the system, 32 BIT AUDIO UNIT BRIDGE (10.6.8 in my case) that bridges up, from 32 to 64 - so I can run Mainstage, which hosts my VI's (unless I'm working in standalone, which I do sometimes, less complicated...) in 64 bit mode, and I just have to click on the grey window of a 32-bit plug-in and it magically opens! In Digital Performer (v.8.0.1) - my other main software, I still run in 32 bit mode, because although 64 is available as of this version, which came out about 3 months ago, the above-mentioned 32 bit Audio Unit Bridge (to 64 bit) doesn't 'come alive' in DP, and although some of the guys are talking about something else: a 'jBridge' software that supposedly does the same thing, I haven't been able to get ijBridge to work on my system with DP. So I just run DP in 32 bit mode, and don't notice a difference (except the Memory Meter bar-graph is always at 1/2, instead of much lower, as it in in 64 bit mode when I try 64bit out.) So, yes, eventually 64 bit Arturia would be cool, but other than this weird audio glitching that's surfaced after I downgraded to SEM v. 1.1.3 (because of the Controller Learn problem in 1.1.5) - I can live without a 64 bit standalone version. For now. Maybe the glitches wouldn't in 64 bit, or maybe I'm now running with some 1.1.5 components (though I was pretty careful to uninstall it all before reinstalling 1.1.3) combined with 1.1.3 itself. . . Thank you, and all of Arturia, for being so responsive to your users' ideas!