This is a great but challenging request. The Motorola Xoom MZ604 (Wi-Fi only, "Wingray") is a vintage device (2011). Finding a modern, stable, and well-documented custom ROM requires digging into legacy forums.
The first boot after a custom ROM takes very long (up to 10 minutes). The OmniROM boot animation (the glowing circle) will loop. Do not force restart. Let it build the cache.
Note: MZ604 is legacy hardware; builds are community‑maintained. Prioritize ROMs: motorola xoom mz604 custom rom
CyanogenMod 10.1 (Android 4.2.1): A popular choice for users seeking Jelly Bean features, though it may contain minor bugs as it was often marked as "under development".
fastboot oem unlock, but success varies.Preparation and Requirements
Now, the hunt for the ROM. The Xoom’s prime had been the golden age of XDA Developers. Forums upon forums of heroes in hoodies crafting custom kernels and aftermarket firmware. I found it: EOS-4.0.4-20121015-193.zip. Team EOS’s Jelly Bean build. The last, great gasp for the Tegra 2-powered tablet. Buried in a thread from 2013, the download links were dead. But the internet remembers. A cached link, a Russian file-hosting site that looked like a security risk, and a prayer later, the 150MB file slowly trickled onto my drive.
Note: Do not proceed without a verified unlock method for MZ604; search Xoom‑specific forums for confirmed steps. This is a great but challenging request
Holding Volume Up and Power, the Xoom rebooted into a bright, orange-text menu. ClockworkMod. I was in the cockpit. Using the volume rocker as a clumsy cursor, I navigated: wipe data/factory reset. wipe cache partition. wipe Dalvik cache. Each command felt like pulling a rotten tooth. The old, laggy, broken Honeycomb ghost was exorcised.