: Versions 5.6 and above introduced changes to u-boot that make it significantly harder to install custom OS images like OpenWrt .
page. While v5.5.6 is a legacy version, it can often be found by selecting "See past firmware" in the downloads section. Hardware Platform Common Compatible Devices Firmware File Prefix NanoBeam M5, PowerBeam M5, Newer NanoStation M5 Original NanoStation M5, Rocket M5 (Older) Important Note: Ubnt Firmware Xw.v5.5.6 Download
Before downloading any firmware, you must confirm that your device runs on the (sometimes written as "Xw") chipset. Ubiquiti has three major legacy architectures: : Versions 5
: Security and Performance Analysis of Legacy Ubiquiti Firmware (XW.v5.5.6) in Modern Network Deployments Newer NanoStation M5 Original NanoStation M5