Sorry, I misread your question.  The current version of Chimera should run on macOS 10.12 or later.  Get it from the UCSF Chimera download page.  

--Eric

On Dec 17, 2025, at 4:52 PM, Eric Pettersen via Chimera-users <chimera-users@cgl.ucsf.edu> wrote:

Hi Oleg,

The last version of ChimeraX that is certain to work with macOS 10.13 is 1.1.  Though it should run, some features may not work.  In particular, the web services infrastructure that ChimeraX uses has changed since then, so things like Blast and Modeller won't work.

You can access the 1.1 release by using the "Older Releases" link near the top of the ChimeraX download page.

--Eric

Eric Pettersen

UCSF Computer Graphics Lab

On Dec 17, 2025, at 1:10 PM, Elaine Meng via Chimera-users <chimera-users@cgl.ucsf.edu> wrote:

Begin forwarded message:

Subject: [Chimera] Request for download link: UCSF Chimera for macOS High Sierra

Date: December 16, 2025 at 10:10:53 PM PST

Cc: Oleg Murashko <o.murashko@gmail.com>

Dear Chimera Team,

I hope you are well.

Could you please provide a download link for the last version of UCSF Chimera
that is compatible with macOS 10.13 (High Sierra)?

We are currently maintaining a legacy macOS system for compatibility reasons,
and newer versions of Chimera / ChimeraX are not supported on this OS.

Thank you very much for your time and assistance.

Best regards,
Oleg

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