For the Q1/ Q2/ Q3/ Q4/ Q5, why can't I use Capslock to change the input language source on the Mac? Zoe March 02, 2023 02:52 Updated It is related to the NKRO issue, we have released new firmware that solved this issue. You can click on this link to go to the latest firmware. Related articles Keychron Q3 User Manual I cannot use the Caps Lock key on my Q1 to change input language on the macOS. What should I do? How to Factory Reset or Flash Firmware for Your Keychron Q3 keyboard? What are the knob cap measurements for Q2? Keychron Q2 User Manual