Mac + Uno + avrdude: stk500_recv(): programmer is not responding

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

What I tried:

• I have 4 Uno's at the table (original + free versions), the same issue.
• I have installed newest drivers from here, tried with and without them.
• tried with avrdude which comes with Arduino IDE (1.0.5 and nightly builds) and newest avrdude v.6.1 brew install avrdude
• different baud rates down to 9600
• tried to press reset after bytes are sent like suggested here

Successfully solved with Hex Uploader.

It is created for flashing .hex files to Arduino for Mac OS.

Options for other OS are described in the grbl documentation.