Static while using a Macbook with a focusrite interface

[LVanarsdall]

Hello all. I am having problem with a teacher who is having latency and static issues while using a focusrite interface with a condensor microphone with his Macbook. While in have session, I have him go to Manage/Audio Settings/ Audio Booster, where I adjust his bitrate and audio frame size. I have him at 128K and 2ms, but when I have him go up or sown on those settings the static remains. He tells me he is also getting a message about "his sample rate not matching". Is this the source of the static? if so, do I reinstall the device, or use the focusrite application to change the sample rate? I am not sure on the net step. Thank you.