cloning, dodging and burning on mac

[pop]

i just got gimp and can't wait to get started, i've know what most of the tools do, but can't get them to work.
how do i actually use them? i select the tool, but nothing happens when i click on the photo? huh? pls help

[lamaz1928]

hmm....maybe reinstall? idk (this needs to be moved to the mac section)

[Auria]

Can you post a screenshot, especially of the tools settings?

Depending on your settings, these tools can have very subtle results