Install Mailcatcher on OSX - works well with macOS Sierra High 10.12.X

mailcatcher-install.md

05/25/2018: tested with macOS Sierra High 10.12.6

08/04/2020: added @mayesa's suggestion to fix an exception with EventMachine 08/04/2020: tested with macOS Catalina 10.15.5

Install MailCatcher:

brew install ruby
sudo gem install mailcatcher

Run:

mailcatcher &

Or set it up a daemon.

To set it up for PHP: edit php.ini (on OSX brew, /usr/local/etc/php/5.5/conf.d/mailcatcher.ini) and paste the following configuration:

sendmail_path = /usr/bin/env /usr/local/bin/catchmail -f [email protected]

put any email you want instead of [email protected]

To test it:

php -r "mail('[email protected]', 'test', 'test');"

Then, visit the mailcatcher backend : http://localhost:1080

Troubleshoot

• If you got a 'require': cannot load such file -- i18n/core_ext/string/interpolate (LoadError) exception, run:

sudo gem uninstall i18n
sudo gem install i18n -v 0.6.11
sudo gem install interpolate

(see sj26/mailcatcher#155)

• If you got an Unable to load the EventMachine C extension exception, run:

sudo gem uninstall mailcatcher eventmachine
sudo gem install mailcatcher

Hi i have installed mailcatcher using the standard 'brew' and 'gem' approach described above. During the past year everything worked fine, but quite recently (using MacOS Catalina 10.15.4) i started getting following error message and i'm unable to start mailcatcher:

Unable to load the EventMachine C extension; To use the pure-ruby reactor, require 'em/pure_ruby' Traceback (most recent call last): 10: from /usr/local/bin/mailcatcher:23:in '<main>' 9: from /usr/local/bin/mailcatcher:23:in 'load' 8: from /Library/Ruby/Gems/2.6.0/gems/mailcatcher-0.7.1/bin/mailcatcher:3:in '<top (required)>' 7: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in 'require' 6: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in 'require' 5: from /Library/Ruby/Gems/2.6.0/gems/mailcatcher-0.7.1/lib/mail_catcher.rb:15:in '<top (required)>' 4: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in 'require' 3: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in 'require' 2: from /Library/Ruby/Gems/2.6.0/gems/eventmachine-1.0.9.1/lib/eventmachine.rb:8:in '<top (required)>' 1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in 'require' /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in 'require': dlopen(/Library/Ruby/Gems/2.6.0/gems/eventmachine-1.0.9.1/lib/rubyeventmachine.bundle, 0x0009): dependent dylib '/usr/local/opt/openssl/lib/libcrypto.1.0.0.dylib' not found for '/Library/Ruby/Gems/2.6.0/gems/eventmachine-1.0.9.1/lib/rubyeventmachine.bundle' - /Library/Ruby/Gems/2.6.0/gems/eventmachine-1.0.9.1/lib/rubyeventmachine.bundle (LoadError)

Same here

@radrr I fixed the above error by running

sudo gem uninstall mailcatcher eventmachine
sudo gem install mailcatcher

@radrr I fixed the above error by running

sudo gem uninstall mailcatcher eventmachine
sudo gem install mailcatcher

Hey Mayesa, you have solved the issue, mailcatcher now runs again as a charm :) many thanks!

Can also confirm that @mayesa's solution works.

To fix build issues with Catalina:

gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration"
gem install mailcatcher

source

@mayesa's solution works

gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration"

This is what worked for me on Mac M1. Thank you

gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration"

Works on OS Big Sur. Thank you!

To fix build issues with Catalina:

gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration"
gem install mailcatcher

source

works on Big Sur!

macOS Monterey work:

gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration"
gem install mailcatcher

Got this with my macbook air on Monterey:

ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /Library/Ruby/Gems/2.6.0 directory.
macbookair@macbooks-air ~ %

To fix build issues with Catalina:

gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration"
gem install mailcatcher

source

Worked on Monterey, thanks!