Apple Offers 12 Improvements with Logic 9.1.7 Update

Apple updated Logic Pro and Logic Express late on Tuesday; both products are now version 9.1.7. The update includes 12 different bug fixes and other improvements to the professional audio recording solution for the Mac.

Logic Pro Screenshot

Logic Pro Screenshot

The patch notes for Logic Pro included in Software Update are overly sparse, listing just three bug fixes. The more detailed patch notes on the update’s KnowledgeBase entry offer the full picture on what’s included.

The patch notes for Logic Pro 9.1.7 in full:


  • Provides compatibility with songs created with GarageBand for iOS 1.2.

Performance and Stability

  • Resolves an issue in Logic Pro 9.1.6 in which projects with a large number of fades displayed “I/O Error, Result code = -36” when playback was started.
  • Improves performance when using multiple instances of EXS24 in 32-bit mode with EXS24 Virtual Memory mode active.
  • Resolves several issues related to the download and installation of basic and additional content.
  • Resolves an issue that could occur which caused the application to stop responding when performing Undo. This would occur after deleting a file or region in the Audio Bin.

Plug-ins and Instruments

  • The Output Distortion setting for the Compressor plug-in now works as expected with the “ClassA_R” and “ClassA_U” models.
  • Fixes an issue in which the Autofilter plug-in might produce clicks with certain settings.
  • The “Select Zone of Last Played Key” setting now works as expected in the EXS24 editor.
  • When adding Auxes as additional outputs for Multi Output Software Instruments, the additional Auxes are automatically assigned the same color and track icon as the Software Instrument.


  • Fixes an issue in which copying a MIDI region in a project which does not start at 1 1 1 1, and in which the Transposition track is active, might result in unexpected transposition of the copied region.
  • The Controls View of plug-in GUIs now fit properly on the 11-inch MacBook Air display.
  • Resolves an issue in OS X 10.7.x Lion that caused the Consolidate Project command in Logic to open a backup of the project at the end of the process.

Logic Pro 9.1.7 is a 203.6MB download through Software Update, or a 195.66MB download through Apple’s support site. Logic Express 9.1.7 is a 139.92MB download through Apple’s support site.