I'm trying to upload .hex file to Arduino. I don't have any problems with uploading code through an IDE (like blink example or any other). The port and board are correct. So, the problem appears when I try to upload
avrdude -pm328p -carduino -P/dev/tty.usbmodemfd121 -b57600 -D -Uflash:w:grbl_v0_8c_atmega328p_16mhz_9600.hex -v -v -v -v avrdude: Version 6.1, compiled on Mar 23 2014 at 04:42:55 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "/usr/local/Cellar/avrdude/6.1/etc/avrdude.conf" User configuration file is "/Users/Mikhail/.avrduderc" User configuration file does not exist or is not a regular file, skipping Using Port : /dev/tty.usbmodemfd121 Using Programmer : arduino Overriding Baud Rate : 57600 avrdude: Send: 0 [30] [20] avrdude: Send: 0 [30] [20] avrdude: Send: 0 [30] [20] avrdude: ser_recv(): programmer is not responding avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00