PreSonus is having a discount sale on Studio One 2.6 this month through September 30, 2013; and to do ReWire 2 and to use VST effects plug-ins, VSTi virtual instruments, and Audio Unit (AU) plug-ins and instruments on the Mac, you need Studio One 2.6 Producer, which Sweetwater in the US currently has discounted at $149 (US), which includes the PreSonus instant discount and a price drop. It is an electronic download, and the information is sent via email approximately 15 minutes after you purchase it, if you purchase it during regular hours, which is the way I did it earlier today after doing a bit of research and being satisfied that Studio One 2.6 does ReWire 2 correctly, which it does, as you can see in the following YouTube video that I made a few hours ago . . .
Studio One 2.6 Producer Full Download (Sweetwater)[
NOTE: You also can buy it at the same discount price directly from PreSonus, although possibly with added sales tax, which is the case depending on where you are located if you get it from Sweetwater . . . ]
Studio One 2.6 Producer Full Downoad (PreSonus)StudioOne 2.6, NOTION 4, Reason 7, ReWire -- YouTube videoOn the Mac Pro running Mac OS X 10.8.4 (Mountain Lion), Studio One 2.6 does ReWire 2 very nicely in 64-bit mode; hence I am happy with everything . . .
This maps to four Digital Audio Workstation (DAW) applications that I have verified for doing ReWire 2 in 64-bit mode on the Mac, and here in the sound isolation studio, this is the key criteria . . .
Digital Performer 8 (MOTU), Live 9 Standard (Ableton), Logic Pro 9/X (Apple), and Studio One 2.6 Producer and Professional (PreSonus) all do ReWire 2 in 64-bit mode very nicely on the Mac, and they support VSTi virtual instruments, VST effects plug-ins, AU virtual instruments, and AU effects plug-ins. They also support MIDI, which is another important functionality . . .
THOUGHTSWhen I read that PreSonus had acquired Notion Music, my primary concern was determining whether Studio One does 64-bit ReWire 2 and supports VSTI, VST, and AU for virtual instruments and effects plug-ins, which it does at the Producer and Professional levels, and since I already have most or all of the extra stuff that comes with the Professional version, this makes the Producer version the best fit here in the sound isolation studio, and $149 (US) is an attractive price, so I got it from Sweetwater and verified that it works . . .
My perspective is based on knowing that in the DAW arena the Abelton, Apple, and MOTU folks are smart and give great attention to detail, which is what needs to be done to get ReWire 2, VSTi, VST, and AU technologies working correctly, hence since Studio One 2.6 does all that stuff, this gives me a "warm and fuzzy" about the PreSonus folks, which in turn gives me a "warm and fuzzy" about the newly announced Notion Music acquisition, because I also know that the Notion Music folks are smart and diligent, which is fabulous . . .
Fabulous! 
P. S. Among other things, PreSonus also makes studio monitor systems, and their Sceptre S8 studio monitor system has a frequency response at -10 dB of 38-Hz to 23,000-Hz, which maps to the PreSonus folks being honest, since the low end of the range is lower than the low-pitch '
E" string on an electric bass at standard "Concert A" tuning (440-Hz reference pitch) and their Eris E8 high-definition active studio monitors have a frequency range of 35-Hz to 22,000-Hz, which also is
not junk, although they are bookshelf size studio monitors and as such are too small to be primary studio monitors, but at least they do deep bass correctly. which makes them suitable for comparison purposes or whatever . . .
The reality for studio monitor systems is that to have a calibrated full-range system with a flat equal loudness curve at 85 dB SPL, you need big and heavy loudspeakers, because the woofers have to push a lot of air, and even though the sound isolation studio is approximately 6 feet wide by 7 feet high and 12 feet long, the fabulous studio monitor system has two 12" deep bass subwoofers and a pair of 15" two-way loudspeaker units, which I run at approximately 3 on a volume scale from 0 to 10, which as measured by a digital SPL meter is right at 85 dB SPL, and it has a flat equal loudness from 20-Hz to 20,000-Hz which is the full range of normal human hearing, but I push it a bit downward into the subsonic range, perhaps as low as 10-Hz, which I can do because the deep bass subwoofers are running at low volume, hence can be pushed in this way . . .
Nevertheless, I like finding a commercial-off-the-shelf pair of studio monitors that go down to 35-Hz and 38-Hz, since it is huge clue that the acoustic design engineers are smart and are
not sneaky weasels . . .
This might make sense only to me, but in doing a bit of research on PreSonus, I like what I am finding, really . . .
Really! 