openssl@1.1 (deprecated)

Install command: 
brew install openssl@1.1

Cryptography and SSL/TLS Toolkit

https://openssl.org/

License: OpenSSL

Formula JSON API: /api/formula/openssl@1.1.json

Formula code: openssl@1.1.rb on GitHub

Bottle (binary package) installation support provided for:

macOS on
Apple Silicon		 sonoma ✅
ventura ✅
monterey ✅
big sur ✅
macOS on
Intel		 sonoma ✅
ventura ✅
monterey ✅
big sur ✅
Linux x86_64 ✅

Current versions:

stable ✅ 1.1.1w

Other versions:

openssl@3 3.6.0 Cryptography and SSL/TLS Toolkit
openssl@3.5 3.5.4 Cryptography and SSL/TLS Toolkit
openssl@3.0 3.0.18 Cryptography and SSL/TLS Toolkit

Keg-only

Depends on:

ca-certificates 2025-12-02 Mozilla CA certificate store
A CA file has been bootstrapped using certificates from the system
keychain. To add additional certificates, place .pem files in
    $HOMEBREW_PREFIX/etc/openssl@1.1/certs

and run
    $HOMEBREW_PREFIX/opt/openssl@1.1/bin/c_rehash

Analytics:

Installs (30 days)
openssl@1.1 6,356
openssl@1.1 --HEAD 7
Installs on Request (30 days)
openssl@1.1 3,870
openssl@1.1 --HEAD 7
Build Errors (30 days)
openssl@1.1 0
Installs (90 days)
openssl@1.1 17,444
openssl@1.1 --HEAD 17
Installs on Request (90 days)
openssl@1.1 10,774
openssl@1.1 --HEAD 17
Installs (365 days)
openssl@1.1 50,163
openssl@1.1 --HEAD 56
Installs on Request (365 days)
openssl@1.1 36,476
openssl@1.1 --HEAD 56