unable to install the new M2

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David Eisenbud

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May 12, 2026, 12:13:22 PM (8 days ago) May 12
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...or rather, when I install it, it doesn't work:

(base) de@MacBookPro bin % ./M2

dyld[97771]: Library not loaded: /opt/homebrew/opt/fflas-ffpack/lib/libfflas.1.dylib

  Referenced from: <754EDB5F-CE28-3D04-9C44-DD14413A7211> /opt/homebrew/Cellar/macaulay2/1.26.05/bin/M2-binary

  Reason: tried: './../lib/Macaulay2/lib/libfflas.1.dylib' (no such file), '/libfflas.1.dylib' (no such file), '/opt/homebrew/opt/fflas-ffpack/lib/libfflas.1.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/opt/fflas-ffpack/lib/libfflas.1.dylib' (no such file), '/opt/homebrew/opt/fflas-ffpack/lib/libfflas.1.dylib' (no such file), './../lib/Macaulay2/lib/libfflas.1.dylib' (no such file), '/libfflas.1.dylib' (no such file), '/opt/homebrew/Cellar/fflas-ffpack/2.5.0/lib/libfflas.1.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/opt/homebrew/Cellar/fflas-ffpack/2.5.0/lib/libfflas.1.dylib' (no such file), '/opt/homebrew/Cellar/fflas-ffpack/2.5.0/lib/libfflas.1.dylib' (no such file)

zsh: abort      ./M2

(base) de@MacBookPro bin % brew reinstall Macaulay2

==> Fetching downloads for: macaulay2

✔︎ Bottle Manifest macaulay2 (1.2 Downloaded   33.2KB/ 33.2KB

✔︎ Bottle macaulay2 (1.26.05)     Downloaded   55.6MB/ 55.6MB

==> Reinstalling macaulay2/tap/macaulay2 

==> Pouring macaulay2--1.26.05.arm64_tahoe.bottle.tar.gz

🍺  /opt/homebrew/Cellar/macaulay2/1.26.05: 23,403 files, 341.2MB

==> Running `brew cleanup macaulay2`...

Disable this behaviour by setting `HOMEBREW_NO_INSTALL_CLEANUP=1`.


--
David Eisenbud
Professor of Mathematics
University of California Berkeley

Doug Torrance

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May 12, 2026, 4:45:27 PM (7 days ago) May 12
to Macaulay2
Try "brew install fflas-ffpack" and then running M2 again.

David Eisenbud

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May 13, 2026, 1:17:26 AM (7 days ago) May 13
to maca...@googlegroups.com
Another problem! This is on another of my machines:

I installed the newest command line tools, and did
brew reinstall fflas-ffpack
after which
brew reinstall Macaulay2 .

I go the error msg:

No such file or directory - getcwd


What can I do?


thanks

David


--
David Eisenbud
Professor of Mathematics
University of California Berkeley

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