# Model 01 works on OSX but not Win7 after flashing latest firmware (NKRO-related?) **URL:** \ **Category:** Uncategorized\ **Created:** [October 21, 2019, 8:26pm UTC](https://community.keyboard.io/t/model-01-works-on-osx-but-not-win7-after-flashing-latest-firmware-nkro-related/3282 "2019-10-21T20:26:01Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![smrq](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.keyboard.io/smrq/32/2993_2.png) [@smrq](https://community.keyboard.io/u/smrq)\ **Post date:** [October 21, 2019, 8:26pm UTC](https://community.keyboard.io/t/model-01-works-on-osx-but-not-win7-after-flashing-latest-firmware-nkro-related/3282/1 "2019-10-21T20:26:01Z")
**TL;DR: My Model 01 doesn’t work on Win7 when in NKRO mode.** I primarily use my Model 01 on a Win7 machine, but I flash firmware for it on my Mac because Unixy toolchains are just easier to deal with. I just wiped my Mac and got the tools for flashing set up again. Steps taken: - Installed Arduino IDE - Cloned Kaleidoscope into ~/Documents/Arduino mkdir -p ~/Documents/Arduino cd ~/Documents/Arduino $ git clone --recursive [https://github.com/keyboardio/Kaleidoscope-Bundle-Keyboardio.git](https://github.com/keyboardio/Kaleidoscope-Bundle-Keyboardio.git) hardware/keyboardio - Cloned Model 01 firmware cd ~/code git clone [git@github.com](mailto:git@github.com):keyboardio/Model01-Firmware.git $ cd Model01-Firmware - Flashed firmware $ make flash BOARD\_HARDWARE\_PATH="/Users/gregsm/Documents/Arduino/hardware" /Users/gregsm/Documents/Arduino/hardware/keyboardio/avr/libraries/Kaleidoscope/bin//kaleidoscope-builder flash Building ./Model01-Firmware 0.0.0-g v1.22-67-g4299 into /var/folders/ps/0ng409xd4g3d6gyr5zdtv5hwv42nwh/T//kaleidoscope-gregsm/sketch/2678476-Model01-Firmware.ino/output… So, everything looks normal, no problems flashing or anything. And after flashing the keyboard works just fine on the machine I’m flashing it on. But when I plug the keyboard into my Win7 machine… no typing! The hardware seems to be working just fine, e.g. the stalker LED effect works, just no actual keys being sent. When I plug the keyboard in to the Win7 machine, it locks it up for a few seconds while the device registers. Device Manager shows two additional “HID Keyboard Devices” and two additional "HID-compliant mouse"s, with one mouse having the yellow triangle exclamation point. Device status on that mouse device is: “This device cannot start. (Code 10)” I don’t actually use mouse control on my preferred keymap so I don’t know whether that is a symptom of anything that matters. No idea whether it looks like this when the firmware is working as expected. I seem to recall at one point that I was unable to flash the latest firmware and that I had to roll back to some earlier version of both Kaleidoscope and the Model 01 firmware. Unfortunately, I have no idea at all what version I had rolled back to-- it was certainly multiple years old. So, my gut instinct is that something about the NKRO HID report isn’t working on Win7. I’ve been bitten by this in the past: I have another keyboard I built myself and wrote the firmware for, USB stack and all, and getting NKRO to work specifically on Windows was problematic. Actually, I just had an idea and tried it out: I tried the magic combo to switch to the boot keyboard report (LFn+Esc+LShift) and after a few seconds, Windows registered a device plugging in and now the keyboard works, albeit without NKRO. So as far as I can tell, that seems to confirm that there’s a problem with the NKRO report at least on Win7.