MIXVIBES Dj Community old forum

Hi to all,
I'm writing because I discover music "jump" using Cross 3.1 in timecode mode with cd and u46mkII when "Beatmatcher is active" otherwise I have no problem.
Could be a problem of my mac?
Could "Beatmatcher" affects a lot the processor??

MAC spec:
-IOS 10.9.2 (Maverick)
-2,26 GhZ Intel Core 2 Duo
- 4 GB 1067 Mhz DDR3
- 250 gb ssd
(no video, no wi-fi, no bluetooth, no energy saver activated)

I thank you in advance!