To switch Logic between 32- and 64-bit mode:
- Quit Logic Pro, if it is running.
- Navigate to and select the Logic Pro application in the Applications folder.
- Choose File, then Get Info.
- Select the "Open in 32-bit mode" checkbox to run Logic Pro in 32-bit mode. Deselect the checkbox to run Logic Pro in 64-bit mode.
The following features are available only when running Logic Pro 9.1 or later, or Logic Express 9.1.1 or later in 32-bit mode.
- Firewire streaming of video
- Digital Cinema Desktop
- OMF import and export
- Recycle (REX) file support
- ReWire support
- Vienna Symphonic Library Tool
- Logic Node processing
- AKAI format sample import
- Internal Apple QuickTime Synthesizer
- Export audio to movie
- Transport controls in movie window
Additionally, the following features are available only when running Logic Pro 9.1 in 32-bit mode (but are available in 64-bit mode with Logic Pro 9.1.1 or Logic Express 9.1.1 or later).
- Conversion to MP3
- AAF import and export
- EuCon control surface support
- Automap of parameters with control surfaces
Additionally, the following features are available only when running Logic Pro 9.1 in 32-bit mode (but are available in 64-bit mode with Logic Pro 9.1.2 or Logic Express 9.1.2 or later).
- REX file support. (Requires compatible REX Library, version 1.7 or later. See the downloads area of the Propellerheads website for details.)
See the Logic Pro and MainStage 64-bit mode FAQ for more information about running Logic Pro in 64-bit mode.