SerialException with Arduino v1.0.2 and Leonardo

I also get the same thing. I am new to the Arduino.
Blink does work, but I cannot get a servo to work (that could be unrelated to this post).

Here's what I get about 99% of the time when I Upload:

processing.app.SerialException: Serial port '/dev/tty.usbmodem1411' already in use. Try quitting any programs that may be using it.
at processing.app.Serial.touchPort(Serial.java:119)
at processing.app.debug.AvrdudeUploader.uploadViaBootloader(AvrdudeUploader.java:201)
at processing.app.debug.AvrdudeUploader.uploadUsingPreferences(AvrdudeUploader.java:67)
at processing.app.Sketch.upload(Sketch.java:1671)
at processing.app.Sketch.exportApplet(Sketch.java:1627)
at processing.app.Sketch.exportApplet(Sketch.java:1599)
at processing.app.Editor$DefaultExportHandler.run(Editor.java:2380)
at java.lang.Thread.run(Thread.java:680)

I am running Arduino 1.0.3
Arduino Micro Board
Mac OS X 10.7.5
I have disabled the Firewall, shut off Bluetooth, and nothing else is connected via USB.

What else can I do?