The current release of Clozure CL is version 1.11.5.

Clozure CL is distributed via GitHub. Please refer to 1.11.5 release page on GitHib. The old Subversion repository is now obsolete.

All versions include both 32- and 64-bit binaries (except for ARM, which is currently 32-bit only).

Please see the installation page for details on completing the installation.

The following table contains direct links to archives of source code and binaries for each supported platform. This

x86 ARM
Mac OS X 10.6 and later .tar.gz
Linux .tar.gz .tar.gz
FreeBSD 8 and later (maybe earlier) .tar.gz
Solaris .tar.gz
Windows XP and later .zip

Mac users may also elect to install Clozure CL from the Mac App Store. It sometimes lags a little behind the version you can get from here.

Compatibility Notes

32-bit x86 ports need SSE2

The 32-bit x86 versions of Clozure CL depend on the presence of the SSE2 instructions. Most x86 processors manufactured and sold in the last several years support SSE2 (all Apple Intel-based Macs do, for instance), but there are some exceptions.

The Wikipedia article on SSE2 lists processor models that support SSE2 (and also notes some of the more notable exceptions).