Anfängerprobleme mit MAC OSX und Arduino UNO

Diese Nachricht kommt wenn der Arduino UNO angeschlossen ist und ohne Arduino UNO

/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-g++ -c -g -Os -Wall -fno-exceptions -ffunction-sections -fdata-sections -mmcu=atmega328p -DF_CPU=16000000L -MMD -DUSB_VID=null -DUSB_PID=null -DARDUINO=103 -I/Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/cores/arduino -I/Applications/Arduino.app/Contents/Resources/Java/hardware/arduino/variants/standard /var/folders/hR/hRuqpaA42RWKV++1YoGogU+++TI/-Tmp-/build5329790772725030753.tmp/Blink.cpp -o /var/folders/hR/hRuqpaA42RWKV++1YoGogU+++TI/-Tmp-/build5329790772725030753.tmp/Blink.cpp.o
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-g++: line 5: /../avr-4/bin/g++: No such file or directory
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-g++: line 5: exec: /../avr-4/bin/g++: cannot execute: No such file or directory
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-g++ hat 126 zurückgegeben