When streaming audio through an interface connected to your Mac, there are many factors that can cause the audio to have artifacts such as pops or clicks, stutters, or dropouts as you play or record. Use this guide to optimize your Mac computer to reduce the chances of this from happening.
  • In Apple Menu > System Preferences > Energy Saver set Computer Sleep to Never. Make sure “Put hard disks to sleep when possible” is NOT checked.

  • In Apple Menu > System Preferences > Network and make sure to remove any unused Network Adapters.  For example remove “Bluetooth PAN” “Thunderbolt Bridge” “Firewire” et al.  Having a port that shares a Bus with your Audio Hardware here can limit its bandwidth.

  • In Apple Menu > System Preferences > Security & Privacy > Firewall make sure Firewall is Off.

  • In Apple Menu > System Preferences > Users & Groups > Admin Account > Login Items and remove any Startup items.

  • In Applications > Utilities > Disk Utility select Macintosh HD and click Repair Disk Permissions. Repeat this for any other Hard Drives you have connected.

  • If you are using a USB Audio Interface, such as Duet, try all the USB ports as one may work better than another due to how the internal ports are hubbed.

  • Be sure you have tried another USB, Thunderbolt or Firewire Cable.

  • In System Preferences > Security & Privacy > Privacy Tab > Analytics (could say Diagnostics and Usage), un-check the boxes for Share Mac Analytics, Share with App Developers, and Share iCloud Analytics. You may also want to disable Locations services found in this same Privacy Tab to further reduce background network traffic.
After these steps please RESTART the Computer.

While you are recording:

  • Check that any Virus Scanners or Backup software (i.e. Hightail or Carbonite) that run in the background are disabled.  High background activity especially over the Network can cause glitches.

  • Close any unnecessary applications while recording (i.e. Skype or Browsers you are not actively using.)

  • Be sure that you record to a separate Hard Drive from your System/OS drive.