Hello
I was running the mechanar dungeon for gold and xmog (in cata prepatch) and after killing the mini bosses and the big boss, and all the trash on the first floor before the elevator, the cache of the legion wont unlock. It appears that since keys were removed, you cannot unlock the cache and wowhead also says after killingGyro the cache should unlock, but it doesnt.
Is there something im missing or is this a bug? I also tried in both normal mode and heroic mode and it doesnt unlock.
+1, same problem, please fix 
Same problem. Blizz removed the key fragments but neglected to properly program the Cache unlock upon boss kill. There is currently no way to unlock the Cache; I have cleared the whole instance and it will remain locked.
Please fix this. Not only does this Cache have a pinnacle transmog item in it, but players levelling through Outlands will be unable to loot gear they deserve for downing the instance bosses.
this is still not fixed
Same I have opened 2 separate Bug Reports on this and both were immediately closed .
I just tested it by killing the first three Bosses in Mechanar and both killing Gatewatcher Iron-Hands and Gatewatcher Gyro-Kil gives a “You hear a faint unlocking sound…” message. But the Cashe remains locked tight. :*(
Confirmed still bugged.
bumping this up, still not fixed
come on blizzard
Still not fixed.
Blizzard please help
Yep Still broken since Cata Launch. Blizz please fix so i can finish my xmog.
Still bugged. I don’t understand why Gatewatcher Gyro-Kill was updated to display a red exclamation mark (I did not notice this before) if this was not fixed. You updated the miniboss’s display but kept the loot unattainable? Huh?
Still bugged today.
Just tested it. Killed both Gatewatcher Iron-Hands and Gatewatcher Gyro-Kil Still gives a “You hear a faint unlocking sound…” message. But the Cashe remains locked tight. :*(
Yep can confirm it’s still bugged
bump, still not working
What a joke. Still not fixed.
bump, this is still a problem
Still bugged.
Still bugged.