MacOS – How to kill “SQL Developer” that seem to be in deadlock using ps aux and kill -9

I had the same problem ! I downloaded version 3.5 for mac & it works fine for me now.

Please Take Note of following.
Even in FireFox version 3.5, I faced a strange behavior. When I try to open a new tab sometimes it goes adding new tabs in bulk, I mean infinite loop of adding new tab. In that case, I used to quit fireFox by force. ( force-Quit ). It happens quite frequently, even though I couldn't determine the exact steps to produce that bug. So, If you face same kind of behavior, please let me know by comments.

killall kills by process name (which is definitively not 77439 and most probably also not Mathematica). You can use kill 77439 or (if this fails) kill -9 77439 instead (but if the process is really stuck, only a reboot will solve the problem).

Also, due the the way sending/processing of signals (like kill -9) works in Unix/OS X, there are situations where a process will be unkillable. One typical example for this is if a process gets stuck while accessing some external device and never actually gets control back. In such situations a reboot is the only way to get rid of the process.