Hi! I've been trying to use the clamshell mode for my MacBook Air (13', A1466) and my monitor (Lenovo ThinkVision T24i-2L Display) but it shows me a window with the message "Input signal out of range, please change to 1920x1080@60Hz" but the problem is that I don't have an option to change to 1920x1080 and 60Hz. What can I do?
P.S. I tried every option I could from Set sleep and wake settings for your Mac - Apple Support
MacBook Air 13″
Your MacBook Air definitely supports that resolution (up to 2560 by 1600 pixels on an external display) so that should certainly be an option.
MacBook Air (13-inch, Early 2014) - Technical Specifications - Apple Support
Hopefully pointing out the obvious though, that is not what you selected in your screenshot. Select the external display. The built-in display is limited to 1440 by 900 pixels.
Confirm use of a correct Thunderbolt cable.
Generic instructions are here: Connect external displays to MacBook Air - Apple Support
MacBook Air clamshell: "Input signal out of range" error
