Instead of searching the same things over and over again, I will try to memorize some stuff…
Today: Sim-links
Open a Terminal and create it:
ln -s /Users/<username>/linkOfYourTargetFolder /Users/<username>/linkOfYourSimLinkFolder
I use simlinks to switch between my stored AIR-Sdks:
ln -s /Users/niggeulimann/work/sdks/AIR_3.8_beta /Applications/Adobe\ Flash\ Builder\ 4.7/eclipse/plugins/com.adobe.flash.compiler_4.7.0.349722/AIRSDK