I have been banging my head against this error today on OSX Yosemite with MySQL 5.7 recently updated with Homebrew. Following suggestions on StackOverflow and elsewhere, I hunted around after
my.cnf files all of which specified
bind-address=0.0.0.0. I even removed and reinstalled MySQL following these instructions and then reinstalled using
brew install mysql. Still no remote connections allowed.
It wasn't until I ran
ps -ax | grep mysql and noticed that the bind address was being passed in the launch command (thus overriding any
my.cnf files) that I dug some more and found out that Homebrew binds MySQL to 127.0.0.1 by default.
~/Library/LaunchAgents/homebrew.mxcl.mysql.plist to change
--bind-address=0.0.0.0 solved my problem (the latter should be changed to a specific IP address if this isn't just a development machine).
I feel this is a vital piece of information that was lacking from most of the resources I consulted so hopefully posting this here will help someone else!
EDIT: As LeandroCR indicated in the comments, running
brew services restart mysql will overwrite the plist file in LaunchAgents with the default one, leading to MySQL mysteriously refusing connections again. So better advice than what I originally wrote is the following:
/usr/local/Cellar/mysql/<yourversion>/homebrew.mxcl.mysql.plist and replace
--bind-address=0.0.0.0 (see MySQL documentation on bind-address)
- Restart mysql using
brew services restart mysql
Then MySQL should continue to accept non-local connections from then on - until you reinstall it, presumably.
Edit (Sep 2019)
Timothy Zorn points out that this problem no longer occurs for MySQL 8.x installed and run via Homebrew, so my answer above, written in 2016, may only be relevant to 5.x.