. Select the native package DMG archive version, not the compressed TAR version.
Click the Download button next to the version you choose.
You are prompted to sign up for an Oracle Web Account, but unless you want one, click No thanks, just start my download.
In your downloads folder, find and double-click the file icon to mount the .dmg archive, which contains the installer.
Double-click the icon for the MySQL package installer.
Read the opening dialog screen and click Continue to begin the installation.
Read the license terms. Click Continue and then Agree to continue.
Click Install. 
Record the temporary password that displays during the installation process. This password cannot be recovered. You must save it. After you log in to MySQL, you are prompted to create a new password.
Press Close on the Summary screen to complete the installation.
The MySQL webpage contains documentation, instructions and change history for the software. 
How to Start My SQL on a Mac
The MySQL server is installed on the Mac, but it does not load by default. Start MySQL by clicking Start using the MySQL Preference Pane, which was installed during the default installation. You can configure MySQL to automatically start when you turn on your computer using the MySQL Preference Pane.