The DDJSR2 is a recently new controller unfortunately Mountain Lion is too old of an OS X to be supported however Yosemite has been a very solid OS X for Serato. So it's either Yosemite or Sierra if you want to use the SR2.

Thank you brother looks like I will be updating my OSX maybe to Yosemite do u think it will run ok on a MBP 2012 i7 2.6ghz 16GB ram?

I just bought it 2 hrs ago and lucky I did not just take it to my gig tonight ohh so lucky I would've had to go home and get my SX2 lol thanks for the info DJ Techniq 👍👍😎

Wow taking new gear to a gig 2hrs. It takes me a while and lots of testing.

LOL I know I was that close to being very embarrassed, Lucky I was so keen to test it out and vwalla :)

Yosemite will run perfectly on your MBP and is one of the most stable options of OSX. I am still on that on my late 2011 MBP 13 i5.

Same. I could give 2 shits about Sierra lol

You'll have to understand though Apple no longer has Yosemite in their App Store for free download. So if you never downloaded the Yosemite install file then you'll need to get it from a friend or someone that has it. You can't upgrade to Yosemite as it's not available it will have to be a clean install. For example I never downloaded the install file for El Capitan so I can't upgrade from Yosemite to EC unless I backup my data and do a clean install with it. Personally I don't care for EC it was the worst OS X for Serato so I avoided it. As a working DJ I can't take chances. I use what's reliable and working. Don't care much for High Sierra either. Eventually I'll have to upgrade but for now I'm satisfied.

thanks Tecniq Ive just been researching online and it seems like I can partition my drive and install Yosemite on one of the partitions so when my mac boots up you hold down Alt and it will give you the option to boot up from the mountain lion drive or the Yosemite drive so at least you can switch OSX if there is a issue but I will only use the Yosemite drive just for the DDJ-SR2 and luckily I did download the Yosemite update when it was available so lucky :) thanks for your help bro :)

You can take it into an Apple Store and they will install it for you. I need to do that as I never downloaded Yosemite and am still on Mavericks, but I can't really be without my laptop for that long.

OK so the situations gone from OK to really bad... but I'm not gonna panic, I did something that ended up me not being able to boot back into my Mac, so I am starting from scratch and contemplating buying a new MBP at the same time lol if this doesn't work.... so I have to create a bootable flash drive and download a Yosemite.DMG file and install it on my flash drive via a software called TransMac... and then I will be able to boot into Mac using the "Alt" key and hopefully choose the bootable flash drive and install a clean copy of Yosemite on my Mac... I kinda like this kind of challenge because then I can say Ive learnt something new about macs (From a full time windows user) and I will be able to save a lot of money taking it to a mac specialist, fingers crossed

so far so good managed to install Yosemite... just remember to go into disk utility and erase your main hard drive or else it wont allow you to install Yosemite on that drive.... just updating the OSX and Optimizing the system using the Serato Mac optimization guide==>support.serato.com and I should be able to fire-up my DDJSR2.... BTW I jumped on the Pioneer Forums and asked the same question and one of the Pioneer Mods answer was "use the old drivers it should work" wow that mod had no idea of what he was talking about lol

Everything is all smooth sailing Rocking Yosemite now I'm glad I made the upgrade I find its much faster and snappier, and I think it looks better then Mountain Lion lol till the next update in 7 years time :)

Nice I'm on mountain lion osx on a 2011 MacBook pro i5 looks like I'm gonna have to take it to Apple store if I wanna go to Yosemite because I'm about to upgrade from Sr to Sr 2.Your Mac has beast specs DJ syndic8 ,how much CPU does serato DJ use on it?Mine goes from 30 to 40 percent with sync ,auto gain and effects always off.

Hi DJ Smash24.... Serato doesn't use up much memory at all with the latest versions 1.98 & 1.99.... but some advice, save your money and do the upgrade yourself, its so easy to do, let me know if you need help upgrading..... the tools you need for upgrading is a 8gb flash-drive and a copy of" Yosemite.DMG" (found on Torrent) and your good to go :)