February 4, 2014: CASA 4.2 is now available for Linux. A version for Mac OSX will follow soon

Obtaining the CASA Release

Supported Operating Systems

The latest CASA release 4.2.0 is available for the following operating systems:

  • Linux
    • RedHat 5.7 and 6.4 (64-bit)
  • Mac OS (A Mac OSX version will follow soon. Please subscribe to the CASA announcemnt mailing list for updates.)
    • Mac OS 10.7 and 10.8 (Lion and Mountain Lion; 64-bit)
CASA may also work on other flavors of Linux. The list above covers those operating systems that we run regular tests on. Mac OS 10.9 will not be supported for CASA 4.2.


Please follow these links for downloading the code for your specific operating system and for the installation instructions.
We also provide links to intermediate, Stable versions, which pave the way for the next, following release. They have additional functionality over the current release but Stables are not as rigorously tested as the release and they likely contain developments that are not yet complete. All available documentation is only for the release, so Stable may behave somewhat differently than what is currently documented.

The latest CASA release is 4.2.0 (r28322, 30 January 2014))


      • Latest Release Linux 64bit: Download
      • Latest Stable is older than the current release
        please use the current release
      • Older Releases for Linux: Archive

Mac OS

Currently we only have CASA 4.1 available for Mac OS. A 4.2 version will follow soon. Please visit the CASA 4.1 download page for Mac OS versions. An announcement will be sent to the CASA announcement mailing lists when a CASA 4.2 version will be available for Mac OS.
      • Older Releases for Mac OS: 10.5   10.6   10.7


      • CASA User Reference & Cookbook (current release): Download (pdf)
      • Source Code: Source Code Notes

If you need additional help, please consult our CASA helpdesk or ALMA helpdesk
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