problem with serial port arduino uno and mac os x mavericks

hi everybody… sorry for my english :smiley:
i have the same problem with arduino uno board:
Arduino:1.5.5 (Mac OS X), Scheda:“Arduino Uno”

Lo sketch usa 1.116 byte (3%) dello spazio disponibile per i programmi. Il massimo è 32.256 byte.
Le variabili globali usano 11 byte (0%) di memoria dinamica, lasciando 2.037 byte liberi per le variabili locali. Il massimo è 2.048 byte.
avrdude: ser_open(): can’t open device “/dev/cu.usbmodemfa131”: Resource busy
ioctl(“TIOCMGET”): Inappropriate ioctl for device
processing.app.debug.RunnerException
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:129)
at processing.app.Sketch.upload(Sketch.java:1672)
at processing.app.Sketch.exportApplet(Sketch.java:1578)
at processing.app.Sketch.exportApplet(Sketch.java:1550)
at processing.app.Editor$DefaultExportHandler.run(Editor.java:2399)
at java.lang.Thread.run(Thread.java:695)
Caused by: processing.app.debug.RunnerException: Problema di caricamento sulla scheda. Guarda http://www.arduino.cc/en/Guide/Troubleshooting#upload per suggerimenti
at cc.arduino.packages.Uploader.executeUploadCommand(Uploader.java:113)
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:127)
… 5 more
processing.app.SerialException: La porta seriale “/dev/cu.usbmodemfa131” è già in uso. Prova ad uscire da tutti i programmi che potrebbero usarla
at processing.app.Serial.(Serial.java:174)
at processing.app.Serial.(Serial.java:92)
at processing.app.SerialMonitor.open(SerialMonitor.java:93)
at processing.app.Editor.handleSerial(Editor.java:2544)
at processing.app.Editor$17.actionPerformed(Editor.java:686)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.AbstractButton.doClick(AbstractButton.java:389)
at com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:95)
at java.awt.MenuItem.processActionEvent(MenuItem.java:650)
at java.awt.MenuItem.processEvent(MenuItem.java:609)
at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:343)
at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:331)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:720)
at java.awt.EventQueue.access$400(EventQueue.java:82)
at java.awt.EventQueue$2.run(EventQueue.java:676)
at java.awt.EventQueue$2.run(EventQueue.java:674)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:690)
at java.awt.EventQueue$3.run(EventQueue.java:688)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:687)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

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How ca i resolve this? thanks

Main problem is that some reason Arduino Uno belives that serial port is ready in use. "avrdude: ser_open(): can't open device "/dev/cu.usbmodemfa131": Resource busy"

Try this first : Check is there any other software wich using port. If not follow these instructions What if I get a gnu.io.PortInUseException when uploading code or using the serial monitor (on the Mac?)

Jafarin