problem uploading a sketch to esp8266-12e

Development Tools IDE 1.x
1

hi
i just reinstalled my mac system because of a damn broken disk
and now i was installing esp-nodemcu stuff for arduino.
installed the chip driver and everything as i did before
i can chose the correct bpard and correct port: cu.SLAB_USBtoUART
but now when i try to flash
i have this error:

error: failed reading byte
warning: espcomm_send_command: cant receive slip payload data
error: unslip sequence wrong
warning: espcomm_send_command: can't receive command response header
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

any idea?

the device and the cable and the usb port are ok

2

i also try with esptool.py
with this line:
esptool.py --port /dev/tty.SLAB_USBtoUART write_flash 0x00000 /var/folders/vz/qxry2ffs3rnd2xtd557pgcf00000gp/T/arduino_build_657411/Blink.ino.bin 0x40000 /var/folders/vz/qxry2ffs3rnd2xtd557pgcf00000gp/T/arduino_build_657411/Blink.ino.bin

but it keeps "connecting..." forever

then i can't even stop the process

3

ok nobody answered.
anyway
i installed another version of the driver from silabs website and now it's working