Cannot setup Drupal anymore Ever since I switched to a brand new retina MacBook Pro, I'm not able to setup a new Drupal installation anymore... 

I use MAMP and I configure my vhosts.conf so I can work on virtual hosts (like dev.newproject.com). But whenever I try to install a new Drupal installation, it looks like the setup is confused... 

Normally, you have

 1. Choose profile
 2. Choose language
 3. Verify requirements
 4. Set up database
 5. Install profile
 6. Configure site
 7. Finished


But for some reason, after step 5, het installation goes back to step 1 or 3 or whatever step... When I look in my database, it looks like Drupal has been installed and also a settings.php file was created, but I'm in an infinite set-up loop...

Has anyone ever experienced such weird behaviour? And how can I fix this?
It could be write permissions of the files - try chmod -R a+rw . command in Terminal in the root of your drupal folder. It could be a time out meaning that the database is not been written correctly (don't have a remedy for that, except for not using a native setup, but rather a Virtual Machine, VM-based setup...)

You might want to consider a VM-based setup (which would more closely resemble your production environment), see a guide I wrote to using Vagrant to automate generation of a setup here: https://stackoverflow.com/a/15067918/227926