Hello,
When trying to install the example blink script to my ESP8266 on my macbook, i'm getting the following error:
/Users/username/Library/Arduino15/packages/esp8266/hardware/esp8266/2.5.0-beta1/tools/signing.py --mode sign --privatekey /Applications/Arduino.app/Contents/Java/examples/01.Basics/Blink/private.key --bin /var/folders/nt/q_krc51n1_d2h9yzqyswpv780000gn/T/arduino_build_841541/Blink.ino.bin --out /var/folders/nt/q_krc51n1_d2h9yzqyswpv780000gn/T/arduino_build_841541/Blink.ino.bin.signed
fork/exec /Users/username/Library/Arduino15/packages/esp8266/hardware/esp8266/2.5.0-beta1/tools/signing.py: permission denied
Error compiling for board NodeMCU 0.9 (ESP-12 Module).
I already tried to give chmod 755 permission to Arduino15/ and to var/folders/nt, but it didn't work.