Apple Releases Logic Pro 9.1.8 Maintenance Update

Apple released Logic Pro 9.1.8 this week, an update sandwiched between the company's media event and earnings report. The update includes several bug fixes dealing with audio, performance, plugins, compatibility with third party products, and other issues.

Logic Studio

Apple's patch notes:


  • Additional content downloads now behave correctly when installing on OS X Lion and OS X Mountain Lion.
  • Resolves an issue in which the Save As command sometimes resulted in an alert dialog in Logic 9.1.7.


  • Fixes an issue that caused an Airplay dialog to repeatedly appear.
  • Relaunching the audio driver now reliably applies changes made to the buffer size.

Performance and Stability

  • Resolves performance issues when using plug-ins that provide frequent graphic feedback.
  • Resolves an issue that could cause an abnormally large monitoring delay after a computer wakes from sleep.

Plug-ins and Instruments

  • Fixes an issue with ES2 that could create distortion when a sidechain was used as the modulation source.
  • Tuner now responds consistently when used in a channel strip that also contains plug-ins which introduce latency.
  • The MIDI channel for a multi output software instrument is no longer changed when adding Aux outputs when there are regions on the track.


  • Logic now properly maintains Aux assignments for multi-output instances of Kontakt that are migrated from earlier versions to Kontakt 5.
  • Resolves an issue in which deleting tracks took longer than expected if Melodyne Editor was inserted on a track.

The update can be downloaded from the Mac App Store. It's free for owners of Logic Pro 9 and Logic Studio 2, which includes Logic Pro 9. The full version of Logic Pro is US$199 on the Mac App Store.