i can't update EFI and SMC firmware

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hi everyone,
see on support apple pages have new version imac 27" late 2013, download , install got alert not support. don't understand, pls pls help, thank you!
http://support.apple.com/en-us/ht201518

[​img]
 

i'm no expert on this, looks you're running version newer 1 downloaded. 1 downloaded released in 2013 mountain lion likely, since yosemite installer update firmware.
 


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