I just downloaded the Android Studio .dmg for OSX. Per the installation instructions, I've dragged it to the application folder and launched the application.
But the SDK Manager and AVD Manager are greyed out and are impossible to use.
Any ideas on an installation step I may have missed?
For people coming for this same problem for Windows: you won't have an Android SDK anywhere if it is your first time with Android. Also, here the Android Studio doesn't come with a packed SDK Manager, so you need to download one.
So this is what you may do: