The flashing utilities require a Windows operating system.
When hunting for a valid image ( .img ) file, avoid generic "MXQ 4K firmware" packages. You specifically need an image compiled for the Rockchip RK322X architecture featuring Realtek Wi-Fi drivers. r29 mxq lp3 v23 firmware link
No official website hosts this firmware because MXQ devices are generic white-label products. Avoid any site claiming to be “MXQ Official Firmware Center”—that does not exist. Stick to community-verified links, and your MXQ Pro 4K will run for another two years. The flashing utilities require a Windows operating system