# Install acl2 with Homebrew, apt, MacPorts, Nix Logic and programming language in which you can model computer systems. Version 8.7 via Homebrew; verified 2026-06-05. ## Install ```sh sudo av install brew:acl2 ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install acl2 ``` Evidence: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install acl2 ``` Evidence: MacPorts ports tree: math/acl2/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - Debian apt (92%): ```sh sudo apt install acl2 ``` Evidence: Debian stable package indexes: acl2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - Nix (92%): ```sh nix profile install nixpkgs#acl2 ``` Evidence: nixpkgs package indexes: pkgs/by-name/ac/acl2/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 ## Package facts - **Package key:** brew:acl2 - **Package manager:** Homebrew - **Package manager page:** - **Version:** 8.7 - **Source summary:** Logic and programming language in which you can model computer systems - **Homepage:** - **Repository:** - **Upstream docs:** - **License:** BSD-3-Clause - **Source archive:** - **Last updated:** 2026-06-05T11:32:36Z - **Generated:** 2026-07-08T07:18:31+00:00 ## Executables - acl2 (cli) - acl2p (cli) - acl2 (alias) - acl2p (alias) ## Dependencies - sbcl ## Install behavior - Post-install hook: not defined - Bottle: available on arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux ## Freshness - Page generated: 2026-07-08 - Package-manager version: 8.7 - Package-manager updated: 2026-06-05 - Local data: ok - Upstream repository: https://github.com/acl2/acl2 - Upstream latest detected: 8.7 (current) ## Project history and usage ACL2 is both a logic and programming language for modeling computer systems and a theorem prover for proving properties of those models. ### Project history The ACL2 home page expands ACL2 as A Computational Logic for Applicative Common Lisp and describes it as part of the Boyer-Moore family of provers. The same page names Matt Kaufmann and J Strother Moore as the project contacts/authors for the current release page. The official GitHub README divides the project into the ACL2 System and the ACL2 Books, with the system maintained by the ACL2 authors and the books maintained by the broader ACL2 community. ### Adoption history ACL2 adoption is organized around releases, manuals, workshops, mailing lists, and community books rather than a single executable alone. The home page emphasizes extensive documentation, community books, workshops, publications, and course material. Package-manager adoption gives users a way to install a working ACL2 executable without manually building a Common Lisp image, while advanced users still rely on the official source and book-certification workflow. ### How it is used Users model systems in the ACL2 logic/programming language, submit definitions and theorems, and use the prover interactively or through books. The official documentation can be browsed on the web, locally, in Emacs ACL2-Doc, or through the ACL2 :DOC command. The community books are a major part of day-to-day ACL2 use: they provide lemma libraries, utilities, examples, and contributed tools that extend the base prover. ### Why package nerds care ACL2 is package-nerd significant because it packages a formal-methods environment with Common Lisp implementation concerns, a large documentation tree, community libraries, and command-line entry points. It also shows how theorem provers differ from ordinary CLIs: reproducibility depends on the executable, the versioned logic, and certified books lining up. ### Timeline - 2005: Authors of the Boyer-Moore family of provers receive the ACM Software System Award, as noted on the ACL2 home page. - 2015: ACL2 Version 7.0 era predates the move of books to the current GitHub workflow noted by the home page. - 2026: ACL2 Version 8.7 home page published with current manual, release links, and community-book guidance. ### Related projects - Related projects and extensions include ACL2(r), ACL2(p), ACL2s, the ACL2 Community Books, the Boyer-Moore prover family, Common Lisp implementations, and the acl2-devel release fork. ### Sources - - - - source_facts.package-manager ## Security Notes generalized runtime or code generation signal. - **Geiger risk:** yellow / medium - generalized runtime or code generation signal ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** acl2 - **Version Scheme:** 0 - **Revision:** 3 - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## Other Package-Manager Records - Debian apt - acl2 - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: main binary | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - acl2-books - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2-books from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: compiled libraries | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - acl2-books-certs - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2-books-certs from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: library certificates | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - acl2-books-source - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2-books-source from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: library sources | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - acl2-doc - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2-doc from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: documentation | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - acl2-infix - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2-infix from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: infix interface | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - acl2-infix-source - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2-infix-source from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: infix source | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - acl2-source - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: acl2-source from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: source files | https://www.cs.utexas.edu/users/moore/acl2/ - Debian apt - elpa-acl2 - 8.6+dfsg-2: normalized package name match | Debian stable package indexes: elpa-acl2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Computational Logic for Applicative Common Lisp: emacs interface | https://www.cs.utexas.edu/users/moore/acl2/ - Nix - acl2: normalized package name match | nixpkgs package indexes: pkgs/by-name/ac/acl2/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - acl2 - 8.5dfsg-5build3: normalized package name match | Ubuntu 24.04 LTS package indexes: acl2 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Computational Logic for Applicative Common Lisp: main binary | https://www.cs.utexas.edu/users/moore/acl2/ - Ubuntu apt - acl2-books - 8.5dfsg-5build3: normalized package name match | Ubuntu 24.04 LTS package indexes: acl2-books from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Computational Logic for Applicative Common Lisp: compiled libraries | https://www.cs.utexas.edu/users/moore/acl2/ - Ubuntu apt - acl2-books-certs - 8.5dfsg-5build3: normalized package name match | Ubuntu 24.04 LTS package indexes: acl2-books-certs from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Computational Logic for Applicative Common Lisp: library certificates | https://www.cs.utexas.edu/users/moore/acl2/ - Ubuntu apt - acl2-books-source - 8.5dfsg-5build3: normalized package name match | Ubuntu 24.04 LTS package indexes: acl2-books-source from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Computational Logic for Applicative Common Lisp: library sources | https://www.cs.utexas.edu/users/moore/acl2/ - Ubuntu apt - acl2-doc - 8.5dfsg-5build3: normalized package name match | Ubuntu 24.04 LTS package indexes: acl2-doc from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Computational Logic for Applicative Common Lisp: documentation | https://www.cs.utexas.edu/users/moore/acl2/ - Ubuntu apt - acl2-infix - 8.5dfsg-5build3: normalized package name match | Ubuntu 24.04 LTS package indexes: acl2-infix from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Computational Logic for Applicative Common Lisp: infix interface | https://www.cs.utexas.edu/users/moore/acl2/ ## Related links - [Secret-risk packages](https://www.automicvault.com/pkg/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals. - [Terminal utility packages](https://www.automicvault.com/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Language runtime packages](https://www.automicvault.com/pkg/language-runtime-packages/) - Matched language runtime, compiler, or interpreter metadata. - [Networking and protocol packages](https://www.automicvault.com/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [sbcl](https://www.automicvault.com/pkg/brew/sbcl/) - Runtime dependency declared by Homebrew. - [acl](https://www.automicvault.com/pkg/brew/acl/) - Package name indicates the same formula family. - [z3](https://www.automicvault.com/pkg/brew/z3/) - Shares av.db curated category or tags: cli, formal-methods, science, theorem-prover. - [depqbf](https://www.automicvault.com/pkg/brew/depqbf/) - Shares av.db curated category or tags: cli, formal-methods, science. - [ltl2ba](https://www.automicvault.com/pkg/brew/ltl2ba/) - Shares av.db curated category or tags: cli, formal-methods, science. - [ott](https://www.automicvault.com/pkg/brew/ott/) - Shares av.db curated category or tags: cli, formal-methods, science. - [rocq](https://www.automicvault.com/pkg/brew/rocq/) - Shares av.db curated category or tags: cli, formal-methods, science, theorem-prover. - [yices2](https://www.automicvault.com/pkg/brew/yices2/) - Shares av.db curated category or tags: cli, formal-methods, science. - [eprover](https://www.automicvault.com/pkg/brew/eprover/) - Shares av.db curated category or tags: cli, formal-methods, science, theorem-prover. - [rocq-elpi](https://www.automicvault.com/pkg/brew/rocq-elpi/) - Shares av.db curated category or tags: cli, formal-methods, science. ## Combined YAML source View the package source record on GitHub. [combined/acl2.yml](https://github.com/automic-vault/db/blob/main/combined/acl2.yml) ## Sources - Nucleus package database - Geiger risk classifier - package-page enrichment - curated package history - package version freshness - av.db category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph