I am using android-sdk-macosx to download from the internet, then installed Android SDK 2.2 and 2.1 successfully, then I tried to create new AVD on mac, but I don’t have any idea about how to create AVD.
I tried this below mentioned for your reference:
Fig 1.0 Create new AVD

Fig 2.0 I tried to open SDK and AVD Manager in eclipse menu Window --> Android SDK Manager

In Eclipse, go to Windows Menu , Select Preference Option so, following dialog box will appear. Just select the Android-SDK folder using Browse Button.
After doing this step click on the “Apply Button”,
Now, you will be able to create new AVD in your eclipse.
Note, I have upload this image using Windows System, but i am sure, MAC has some, same kind of menu option.