On Pd-extended 0.43.4, both on Snow Leopard (10.6.8) and the same system (late 2008 15" MacBook Pro) upgraded to Mavericks (10.9), I can no longer click and drag objects! I can still click and drag to select objects, but I must use Shift+arrows to move them.

Thoughts? I just tried an external mouse, as well as turning of tapping and multi-gestures on my trackpad. No dice.

Hm. Problem has mysteriously solved itself? I'll keep documenting details here if the problem comes back. First theory is that it may (?) be related to the first time Pd is launched after boot, and CoreAudio (i.e., changing the audio device may have somehow affected click-and-drag functionality).