If your running MAMP Pro and OS X mavericks I’m sure you’ve had some issues. I found this great post about how to fix it.

Here is the short version.

“…
You just need to open keychain access, click on it’s menu bar item “Keychain Access”, then “Certificate Assistant”, and “Create a Certificate”. For Name, enter your name, Identify Type should be kept as Self Signed Root, and Certificate Type should be code signing. You can pretty much click continue on everything else until your certificate…

run… codesign -v /Applications/MAMP\ PRO/MAMP\ PRO.app -v”

Credit where credit is do… Thanks Liam Gladdy!

http://www.gladdy.co.uk/blog/2013/06/16/mamp-pro-under-os-x-mavericks/