I am running a development environment on a MacBook Pro running OS X 10.5.4, PHP 5.2.6, MySQL, Joomla 1.5.5.

The first error I get is:
The following settings prevent RSGallery2 from working without errors:
 _RSGALLERY_NO_IMGLIBRARY

Then, when I need to configure RSGallery, no graphics library is detected even though I have ImageMagick installed.

Any Ideas?