Root lgm210 fastboot flash recovery command not found

[lacy nicole]

can someone please tell me why this command will not work when i try to flash twrp.
here is my terminal attempts

Lacynicole:~ lacyballard$ /Users/lacyballard/Desktop/platform-tools/fastboot devices

LGM2106394e458 fastboot

Lacynicole:~ lacyballard$ fastboot flash recovery /Users/lacyballard/Desktop/platform-tools/twrp.img

-bash: fastboot: command not found

Lacynicole:~ lacyballard$ flash recovery /Users/lacyballard/Desktop/platform-tools/twrp.img

-bash: flash: command not found

Lacynicole:~ lacyballard$ fastboot flash recovery C:/Users/lacyballard/Desktop/platform-tools/twrp.img

-bash: fastboot: command not found

Lacynicole:~ lacyballard$ ./fastboot flash recovery /Users/lacyballard/Desktop/platform-tools/twrp.img

-bash: ./fastboot: No such file or directory

Lacynicole:~ lacyballard$


What else can i try?