First, open the Terminal application. To see if multiple version of curl packages installed, enter:
$ ls /usr/local/Cellar/curl/
$ brew info curl
curl: stable 7.51.0 (bottled) [keg-only] Get a file from an HTTP, HTTPS or FTP server https://curl.haxx.se/ /usr/local/Cellar/curl/7.50.3 (367 files, 2.6M) Built from source on 2016-11-02 at 03:13:19 with: --with-nghttp2 /usr/local/Cellar/curl/7.51.0 (368 files, 2.7M) Built from source on 2016-11-08 at 01:10:09 with: --with-nghttp2 From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/curl.rb ==> Dependencies Build: pkg-config ? Optional: openssl ?, libidn ?, rtmpdump ?, libssh2 ?, c-ares ?, libmetalink ?, libressl ?, nghttp2 ? ==> Options --with-c-ares Build with C-Ares async DNS support --with-gssapi Build with GSSAPI/Kerberos authentication support. --with-libidn Build with support for Internationalized Domain Names --with-libmetalink Build with libmetalink support. --with-libressl Build with LibreSSL instead of Secure Transport or OpenSSL --with-libssh2 Build with scp and sftp support --with-nghttp2 Build with HTTP/2 support (requires OpenSSL or LibreSSL) --with-openssl Build with OpenSSL instead of Secure Transport --with-rtmpdump Build with RTMP support ==> Caveats This formula is keg-only, which means it was not symlinked into /usr/local. macOS already provides this software and installing another version in parallel can cause all kinds of trouble. Generally there are no consequences of this for you. If you build your own software and it requires this formula, you'll need to add to your build variables: LDFLAGS: -L/usr/local/opt/curl/lib CPPFLAGS: -I/usr/local/opt/curl/include PKG_CONFIG_PATH: /usr/local/opt/curl/lib/pkgconfig
Say hello to the cleanup option
The cleanup option can remove all installed or specific formulae, remove any older versions from the cellar. Also, old downloads from the Homebrew download-cache are deleted. Simply type the following command to free up disk space and delete outdated older versions:
$ brew cleanup
It is recommended that you run cleanup after update to get rid of old packages:
$ brew update && brew upgrade && brew cleanup
At the end you will see the following message on screen:
Removing: /usr/local/Cellar/android-sdk/24.2... (1,460 files, 105.3M) Removing: /usr/local/Cellar/android-sdk/24.4... (1,471 files, 136.4M) Removing: /usr/local/Cellar/atk/2.20.0... (205 files, 3.1M) Removing: /usr/local/Cellar/babl/0.1.16... (37 files, 819.1K) Removing: /usr/local/Cellar/bash/4.3.42... (59 files, 7.3M) Removing: /usr/local/Cellar/bash/4.3.46... (59 files, 7.3M) Removing: /usr/local/Cellar/bash/4.4... (145 files, 8.8M) ... .. ... Removing: /Users/veryv/Library/Logs/Homebrew/libtorrent... (1.9K) Removing: /Users/veryv/Library/Logs/Homebrew/most... (5 files, 124.5K) Removing: /Users/veryv/Library/Logs/Homebrew/mtr... (68B) Removing: /Users/veryv/Library/Logs/Homebrew/nmap... (6 files, 1.6M) Removing: /Users/veryv/Library/Logs/Homebrew/openssl... (68B) Removing: /Users/veryv/Library/Logs/Homebrew/rsnapshot... (3 files, 10.2K) Removing: /Users/veryv/Library/Logs/Homebrew/ssh-copy-id... (68B) Removing: /Users/veryv/Library/Logs/Homebrew/wakeonlan... (2 files, 470B) ==> This operation has freed approximately 3.9G of disk space.
A note about cask
Type the following to cleanup cask too:
$ brew cask cleanup
==> Removing cached downloads /Users/veryv/Library/Caches/Homebrew/Cask/gimp--2.8.18-x86_64.dmg /Users/veryv/Library/Caches/Homebrew/Cask/lisanet-gimp--2.8.14p2.dmg /Users/veryv/Library/Caches/Homebrew/Cask/wireshark--2.2.3.dmg /Users/veryv/Library/Caches/Homebrew/Cask/wkhtmltopdf--0.12.4.pkg ==> This operation has freed approximately 199.8M of disk space.