Defenseless, Windu was bombarded with Sith lightning as Sidious unleashed a torrent of deadly energy at the Jedi Master. The forked bolts of lightning penetrated Mace's body, illuminating his form from within. The final blast bodily lifted him into the air, sending his form hurling into the Coruscant skies, to crash lifelessly somewhere in the vast cityscape below.
The Official Site says he's dead.
The full force of Palpatine's powerful bolts blasts MACE. He attempts to deflect them with his one good hand, but the force is too great. As blue rays engulf his body, he is flung out the window and falls twenty stories to his death. No more screams. No more moans. PALPATINE lowers his arm.
The script says he's dead.
Originally posted by Ast
[B] 💃 MACE IS F'N DEAD!!! 💃 [/B]
Ast says he's dead. He must be dead.