This Airport/Bluetooth board may fix problems with making wireless connections to Wi-Fi routers or to Bluetooth equipped accessories like wireless speakers, headphones, and keyboards.
Warning: There are different versions of the WiFi card for different years and models, it will only work with the iMac 21.5" A1418 and 27" A1419 2012 Year Wifi Airport Card replacements (not compatible with other years of A1418/A1419). Please make sure you purchase a compatible model.
-Compatibility:
--Compatible with iMac 21.5″ A1418 2012 year (EMC 2544)
Late 2012 For iMac 13.1 21.5" EMC 2544 MD093LL/A 2.7 GHz "Core i5" (i5-3330S)
Late 2012 For iMac 13.1 21.5" EMC 2544 MD094LL/A 2.9 GHz "Core i5" (i5-3470S)
Late 2012 For iMac 13.1 21.5" EMC 2544 BTO/CTO 3.1 GHz "Core i7" (i7-3770S)
Early 2013 For iMac 13.1 21.5" EMC 2544 ME699LL/A 3.3 GHz "Core i3" (i3-3225)
--Compatible with iMac 27" A1419 2012 year (EMC 2546)
Late 2012 For iMac 13.2 27" EMC 2546 MD095LL/A 2.9GHz "Core i5" (i5-3470S)
Late 2012 For iMac 13.2 27" EMC 2546 MD096LL/A 3.2GHz "Core i5" (i5-3470)
Late 2012 For iMac 13.2 27" EMC 2546 BTO/CTO 3.4 GHz Core i7 (i7-3770)
-Both of the Model "Axxxx"and EMC "xxxx " Number are located beneath the lower cover of the laptop, please double check it to determine the compatibility.