Paste the following text (environment variable setting) into the Terminal window and press Enter:Įcho 'export PATH='/Applications/orca:$PATH' export LD_LIBRARY_PATH='/Applications/orca:$LD_LIBRARY_PATH'' > ~/. Open the Terminal Program (under /Applications/Utilities).ģ. Note: ORCA can in principle be anywhere but here we choose to put it in /Applications.Ģ. Extract archive, rename directory to 'orca' and move to /Applications folder. Download ORCA binaries for Mac (not the installer). Manual quick and simple MAC OS X configuration:ġ. A few 32-bit binaries are available for older ORCA versions.Ī slideshow that shows how to configure ORCA for a single computer (serial), for Windows, see above. Various visualizations programs that can be used with ORCA (to build molecular geometries and visualize results) can be found under Visualization and printing. Note that ORCA runs completely from the command line, there is no graphical user interface. The program then needs to be configured to work correctly from the command line. The archive should be extracted (or an installer program is used) and will then reveal a directory of the ORCA executables. This has the advantage of requiring no compilation.

Note that only binaries are available, no source code. Installer programs for Windows and Mac OS X are also available. The ORCA 5.0 version is available as compressed archives (containing all executables) for Linux, Windows and Mac OSX. Information about the release in the ORCA Forum. The latest version of ORCA, version 5.0 (released July 2021) is the recommended version and can be accessed from the official website. Once logged in, the ORCA Downloads site will be available. First, one needs to register as a user in the forum and log in. ORCA is distributed from the main ORCA site. ORCA is available for Windows, Linux and Mac OS X platforms.

There will be very little information about older versions here.

ORCA 5.0 has been released and is the recommended version.

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