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Setup MacOS 10.14 Mojave Discussion

General • Asked by Chris Oliver

Is anyone else receiving errors with MacOS 10.14 Mojave and the Mysql2 gem? I'm also getting a "Library not loaded: libssl.1.0.0.dylib (LoadError)" error when executing "rails server".



Hey Ted,

If you upgraded, you probably need to uninstall the gem and reinstall it so that it compiles with the new Mojave libraries.

If you have trouble installing it from scratch, see this thread:


I resolved the problem with this:

gem install mysql2 -- --with-opt-lib=/usr/local/opt/openssl/lib


Yes, I have the same error.


what do you think about MacOS Mojave? Is it problematic? Have you got any other issues? I am wondering if it is better to upgrade now or to wait for a little bit.


I updated system to Mojave and generally i am happy. I had only one problem. My bluetooth didn't work in macOS Mojave. I have tried to clear the icon cache by starting your Mac in Safe Mode, then shut it down and restart it normally. It helped!


Latest version of ruby in my rbenv is 2.5.0, how can I update the list?


for readers willing to upgrade it might be a bit different. in particular if you were using rvm which is not compatible with rbenv. I could not understant why installing a new ruby version with rbenv was still linking to a previous one installed with rvm. So to sumarize: go for the installation from Chris above if you are starting from scratch...but follow this if you are coming from another world ;-)


Is the header issue for Mojave resolved? When I run the command sudo installer command listed in the final steps I get the following error: installer: Error - the package path specified was invalid: '/Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg'.


I haven't experienced it myself, but looks like there's some info on StackOverflow


Hi guys!
Thanks for this wonderful guide. Eveything was fine and now I have Ruby on Rails on my mac.
Sorry for stupid question: now I want to test a website. I'd like to try Spina CMS. How can I start? How can I install this gem?

Edit: maybe I made a mistake by skipping the git step... :( I do not understand the step including this instruction: cat ~/.ssh/ what should I do there?

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