I changed couple days ago to a new Mac (Mac OS X 10.9.1) and when plugged in the Arduino Uno (that was working on the old Mac) started to show some errors when uploading the sketch. I checked other topics and troubleshooting but nothing helped. The most interesting thing is that on the old Mac Arduino IDE (v 1.5.6-r2) is uploading the sketch without any errors but on the new Mac (with the same Arduino IDE version) I get this:
Sketch uses 1,116 bytes (3%) of program storage space. Maximum is 32,256 bytes. Global variables use 11 bytes (0%) of dynamic memory, leaving 2,037 bytes for local variables. Maximum is 2,048 bytes. avrdude: stk500_recv(): programmer is not responding processing.app.debug.RunnerException at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:125) at processing.app.Sketch.upload(Sketch.java:1719) at processing.app.Sketch.exportApplet(Sketch.java:1625) at processing.app.Sketch.exportApplet(Sketch.java:1597) at processing.app.Editor$DefaultExportHandler.run(Editor.java:2397) at java.lang.Thread.run(Thread.java:695) Caused by: processing.app.debug.RunnerException: Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions. at cc.arduino.packages.Uploader.executeUploadCommand(Uploader.java:111) at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:123) ... 5 more
What could be the problem ? Thanks.