*URGENT* Canon eos 500d is not turning on after trying firmware update?

[juannie]

I wanted to install Magic Lantern on my Canon DSLR 500D so i tried to update my firmware to the required version.

I took out my SD card and placed it on my MAC Book, and dragged the windows file ONTO my SD CARD without realising the version that i installed were the (windows) one and not the MAC's version.

I slot the SD CARD back to my camera and it's not turning on.

I slot back the SD card into my Macbook and realize it was the wrong file, so i deleted it and tried again. But it still isn't turning on?

Any idea what i should do now?