Glitchy how? Dropouts?

What buffer settings do you have?

The buffer setting is at 10 but I already tried raising it higher and it still does it. When I scratch the wave forms freeze for like a half second and the audio sounds kind of distorted. The faster I scratch the worse it gets.

Where is your music? Internal HD or external?

the obvious answer is el capitan. but it could be something else

I use el crapitan with my S9 with no issues, my 61 that's another issue for another day

Im running Yosemite

Internal

My bad, thought it said capitan, hrmmmm all the drivers correct? you do have to de-install the drivers. the de installer is in the new drivers rar

Yes everything is up to par...

i havent seen many problems around here with your spec computer and yosemite especially with your buffer set at 10 (i used 5 with my s9 and mountain lion then el capitan).

some ppl are getting little glitches but thats more a playback issue.

I guess it could be possible that you got a lemon.

did you try both usb ports ? verify and repair permissions? i dont like to offer any radical solutions and most on the board leave that up to service tickets with serato or pioneer.

what verion of sdj are you using?

Those. And again where is your music. Internal or external?

i had the same problem on similar mac, but disabling Pitch n Time worked for me

I am using the most recent 1.9.1 but it was doing before I updated. Yes I tried both USB ports.

I'm gonna try that.

Can you post up a quick video showing what exactly is happening?

Also try using a different USB cable to see if that works

Sdj timecode signal issue, try putting more weight to ur needle and check if that helps.

I will try that thanks

Callibrate your decks, here is how todo it and it all explained. serato.com