The video files I recorded with MAC OBS have Audio/Video out of sync problem, how to make sure to avoid this issue?

In order to make sure to get precise audio and video syncing all matching up correctly on the recorded file please add audio delay in OBS MAC.
Follow steps below:

STEP 1
Open OBS MAC and click on “Mixer” gear icon.


STEP 2
At “Sync offset” option add value “200” (ms)


Explanation: if the value at “Sync offset” is positive this will let the capture audio to shift back, if the value is negative the capture audio will be shifted forward. When recording with GC510 the audio data tends to be processed faster therefore please set positive value at 200 ms.