I have a late 2013 MacBook Air, running macOS Mojave connected to a 4K Monitor:
Intel HD Graphics 5000:
Chipset Model: Intel HD Graphics 5000
Type: GPU
Bus: Built-In
VRAM (Dynamic, Max): 1536 MB
Vendor: Intel
Device ID: 0x0a26
Revision ID: 0x0009
Metal: Supported, feature set macOS GPUFamily1 v4
Displays:
LG Ultra HD:
Resolution: 2560 x 1440 (QHD/WQHD - Wide Quad High Definition)
UI Looks like: 2560 x 1440 @ 59 Hz
Framebuffer Depth: 24-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Automatically Adjust Brightness: No
Connection Type: DisplayPort
I have read on several occasions that this chipset is able to output 4K, but macOS prevents it from doing so.
Is it possible to force my MacBook Air to output 4K?