Ok, thanks again, your advice was 100% correct and I fix it by changing runner in config.toml but I'm not sure about progress of transferring program, everything looks like it was successful but I think that not till the end - it lacks last step Found pico uf2 disk /Volumes/RPI-RP2 Detected FLASH binary Mapped segment 0x10000100->0x100001c0 (0x10000100->0x100001c0) Mapped segment 0x100001c0->0x10001ddc (0x100001c0->0x10001ddc) Mapped segment 0x10001ddc->0x100023a4 (0x10001ddc->0x100023a4) Mapped segment 0x100023a4->0x10002440 (0x20000000->0x2000009c) Mapped segment 0x10000000->0x10000100 (0x10000000->0x10000100) Transfering program to pico Page 0 / 37 0x10000000 Page 1 / 37 0x10000100 Page 2 / 37 0x10000200 Page 3 / 37 0x10000300 Page 4 / 37 0x10000400 Page 5 / 37 0x10000500 Page 6 / 37 0x10000600 Page 7 / 37 0x10000700 Page 8 / 37 0x10000800 Page 9 / 37 0x10000900 Page 10 / 37 0x10000a00 Page 11 / 37 0x10000b00 Page 12 / 37 0x10000c00 Page 13 / 37 0x10000d00 Page 14 / 37 0x10000e00 Page 15 / 37 0x10000f00 Page 16 / 37 0x10001000 Page 17 / 37 0x10001100 Page 18 / 37 0x10001200 Page 19 / 37 0x10001300 Page 20 / 37 0x10001400 Page 21 / 37 0x10001500 Page 22 / 37 0x10001600 Page 23 / 37 0x10001700 Page 24 / 37 0x10001800 Page 25 / 37 0x10001900 Page 26 / 37 0x10001a00 Page 27 / 37 0x10001b00 Page 28 / 37 0x10001c00 Page 29 / 37 0x10001d00 Page 30 / 37 0x10001e00 Page 31 / 37 0x10001f00 Page 32 / 37 0x10002000 Page 33 / 37 0x10002100 Page 34 / 37 0x10002200 Page 35 / 37 0x10002300 Page 36 / 37 0x10002400