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Curl + Quiche

Follow the guidelines below to build and test HTTP/3 on MacOS.


Install homebrew from


This process replaces your current curl installation. Run the following commands to install required dependencies and build curl with quiche support.

Uninstall curl

$ brew remove -f curl

Build curl with quiche

$ curl -O
$ brew install --HEAD -s curl.rb

When the build is finished, curl binary will be installed on /usr/local/opt/curl/bin. You will need to add to your $PATH.

Verify curl with H3 support built properly

$ curl --help | egrep 'alt-svc|http3'
--alt-svc <file name> Enable alt-svc with this cache file
--http3 Use HTTP v3

Try curl on any HTTP/3 enabled sites using the commands below.

$ curl --http3
$ curl --http3