[Mesa-users] MESA Install Fails on macOS Tahoe (26.0.1) - SDK Compatibility?

[William Stone]

Hi mesa-users,

I'm new to MESA and having trouble installing it on my Apple Silicon
MacBook Air running the latest macOS Tahoe. The ./install script fails very
quickly (in about 1-2 minutes) with C compilation errors like unknown type
name 'FILE' when processing the utils module. It seems the main MESA
library (libmesa.a) isn't being built.


My setup is as follows:

- Mac: MacBook Air (Apple Silicon/aarch64)

- OS: macOS Tahoe 26.0.1 (Build 25A362)

- Xcode Tools: Version 26.0.0.0.1.1757719676

- MESA Version: mesa-24.08.1 (from Zenodo)

- MESA SDK Version: mesasdk-aarch64-macos-25.8.1.pkg (from
http://user.astro.wisc.edu/~townsend/static.php?ref=mesasdk)


I've followed the standard Mac installation steps and troubleshooting,
including:

- Making sure Conda is deactivated.

- Setting the MESA_DIR, MESASDK_ROOT, SDKROOT, and
MESASDK_CLEAN_INCLUDE_PATH environment variables correctly in my
.bash_profile / .bashrc.

- Reinstalling the Xcode Command Line Tools.

- Deleting and reinstalling both MESA and the MESA SDK from fresh downloads.


Even after all this, the C compilation error persists and I have a few
questions:

1. Is this a known issue with MESA/SDK compatibility on the new macOS Tahoe
(26.x)?

2. Is there any estimate for when a MESA SDK version supporting macOS Tahoe
might be released?

I'm wondering if I just need to wait for an updated SDK. Any information or
confirmation would be greatly appreciated!

Many thanks,

Will Stone
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