# Unable to install Jekyll on Mac OS 10.15

**URL:** <https://talk.jekyllrb.com/t/unable-to-install-jekyll-on-mac-os-10-15/5127>\
**Category:** Help\
**Created:** [October 22, 2020, 4:31pm UTC](https://talk.jekyllrb.com/t/unable-to-install-jekyll-on-mac-os-10-15/5127 "2020-10-22T16:31:49Z")\
**Posts on this page:** 1\
**Showing post:** 6

<div class="post-metadata">

**Author:** ![MichaelCurrin](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/michaelcurrin/32/2340_2.png) [@MichaelCurrin](https://talk.jekyllrb.com/u/MichaelCurrin)\
**Post date:** [October 24, 2020, 3:34pm UTC](https://talk.jekyllrb.com/t/unable-to-install-jekyll-on-mac-os-10-15/5127/6 "2020-10-24T15:34:12Z")

</div>

In the middle of the error trace is says the reason it can’t installed the extconf.rb is developer tools.

So try

```auto
xcode-select --install

```

Based on answer [Jekyll won't install on OSX High Sierra out the box](https://talk.jekyllrb.com/t/jekyll-wont-install-on-osx-high-sierra-out-the-box/1754/3)

And step 4 here

> **[How to Install and Run Ruby on Mac OS X - dummies](https://www.dummies.com/programming/ruby/how-to-install-and-run-ruby-on-mac-os-x/)**
>
> The following instructions for installing Ruby have been tested on Mac OS X Yosemite (10.10.4). They should work fine with Mac OS X El Capitan (10.11.1) or Mavericks (10.9.5) as long as you’re running the latest updates for that version of Mac OS X:

---

_[View the full topic](https://talk.jekyllrb.com/t/unable-to-install-jekyll-on-mac-os-10-15/5127)._