"Service Unavailable" Error I'm having a problem installing locally on my Mac (using MAMP Pro, Sequel Pro).  I followed all the steps in the Mijingo installation video - plus a few others.  When I go to install Craft CMS I get the following error message:  


  Service Unavailable  Our site is temporarily unavailable.  Please try again later."


I checked terminal and .htaccess appears hidden under the public directory.  I changed the permissions.  And the config file appears to be pointing in the correct places. 

What might I be missing? ...or at the very least, how do I delete and start again fresh?  Is it as simple as deleting the Craft files and starting over again or are there hidden files that need to be addressed before I can start clean again?
It sounds like you're missing permission on a folder in the /craft directory. Best thing to do, is just retrace your steps by following the official install guide. 

I don't use MAMP though, so there might be extra stuff you need to do, but if you scroll down to the bottom of that page to the Additional Resources section. There are some other links to articles which might help, in particular this one:

Installing Craft CMS on Mac OS X Using MAMP &amp; Sequel Pro

If you do want to start again then you should be safe to delete the /craft folder and try again. Although unless you're missing files, you shouldn't really need to start again.