# Can't install Jekyll. MacOS Big Sur 11.2.3 **URL:** \ **Category:** Uncategorized\ **Created:** [April 11, 2021, 3:40pm UTC](https://talk.jekyllrb.com/t/cant-install-jekyll-macos-big-sur-11-2-3/5866 "2021-04-11T15:40:10Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![rdyar](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/rdyar/32/710_2.png) [@rdyar](https://talk.jekyllrb.com/u/rdyar)\ **Post date:** [April 11, 2021, 5:49pm UTC](https://talk.jekyllrb.com/t/cant-install-jekyll-macos-big-sur-11-2-3/5866/2 "2021-04-11T17:49:33Z")
> [@drbenvincent](#): > > `ERROR: Failed to build gem native extension.` This usually means that the ruby devkit is not installed, though I am not a mac user so not sure how that applies to the mac os. check this post - and the guide @MichaelCurrin links to: > [@Installation Issues on MacOSX - Gem::Ext::BuildError: ERROR: Failed to build gem native extension](https://talk.jekyllrb.com/t/installation-issues-on-macosx-gem-error-failed-to-build-gem-native-extension/4545/3): > > Run without --source 'https://rubygems.org/'. Ruby will use it by default. The gem install command might not be right it installs for your user. In your project, try: bundle install ffi Also on macOS, with Catalina, the system ruby and its gems are locked. So avoid using that ruby. Also you didn’t use the --user-install flag on the gem install bundler which leads me to think you might have used sudo. I wrote I guide here on installing Ruby, Jekyll and Bundler on macOS Catalina, installing … --- _[View the full topic](https://talk.jekyllrb.com/t/cant-install-jekyll-macos-big-sur-11-2-3/5866)._