Espruino keeps disconnecting

Hello, I have a problem with Espruino Pico on Mac.
When I plug it in, red light flashes and then nothing flashes.
When I connect espruino tty.usbmodem1 it connects and after a while it disconnects.
When I want to connect it again, connection options state tty.usbmodem2 and again disconnects.
I tried to reflash the firmware (with success) but still the same.

Sometimes it writes this log:

Connected
>es from flash...
>Console Moved from Serial1
>
=undefined
>echo(0);
<<<<<{"VERSION":"1v81","BUILD_DATE":"Oct  8 2015","BUILD_TIME":"16:03:41","GIT_COMMIT":"8e1efcf898350a290242d732631be15c36f53381","BOARD":"PICO_R1_3","CHIP":"STM32F401CDU6","CHIP_FAMILY":"STM32F4","FLASH":393216,"RAM":98304,"SERIAL":"63004700-13513430-36363435","CONSOLE":"USB","EXPORTS":{"jsvLock":182749,"jsvLockAgainSafe":182737,"jsvUnLock":182713,"jsvSkipName":120321,"jsvMathsOp":209729,"jsvMathsOpSkipNames":277173,"jsvNewFromFloat":209961,"jsvNewFromInteger":210029,"jsvNewFromString":124953,"jsvNewFromBool":209985,"jsvGetFloat":203841,"jsvGetInteger":204657,"jsvGetBool":204105,"jspeiFindInScopes":210601,"jspReplaceWith":135865,"jspeFunctionCall":115713,"jspGetNamedVariable":140209,"jspGetNamedField":229317,"jspGetVarNamedField":228953,"jsvNewW
Disconnected
> 

Can you help me