cant update CF (Error occurred while installing the update: Failed Signature verification)

[Nick Way]

Hi I'm suffering with this issue Bug#3506758 - MySQL 5.6 Unable to Execute Queries

and therefore am trying to update cf 10 to version 13 (current version is 8) however I get 'Error occurred while installing the update: Failed Signature verification'

I'm running Mavericks on Mac.

Can anyone point me to a step by step way to resovle this please (I'm new to Macs and am a cf coder but alas dont have any experience in server admin).

Thanks very much indeed.

Nick

[Carl Von Stetten]

I was going to suggest that you needed to install the mandatory updater, but the Adobe help page for it says you shouldn't need to if you already have update 8 installed.  Might be worth verifying though.

-Carl V.