The Stable update OS4.0.9.0.XEOCNXM has been officially released for Xiaomi 18 Pro Max (codename is madrid). Before updating, please make sure you have downloaded the exact ROM matching your Xiaomi phone/tablet. In Fastboot mode, you can check model code by typing fastboot getvar product in cmd/shell.
The firmware files posted here are all official Xiaomi MIUI or HyperOS ROM, xiaomiROM.com do not own and never modified those firmwares，you will always download the file from Xiaomi server.
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Download Xiaomi 18 pro max (madrid) China HyperOS OS4.0.9.0.XEOCNXM Recovery ROM with Android 17.0. Firmware size is 12.4 GB.