Hello everyone I  am new user please help me my iMac 2011 
21.5 inch
4Gb
500Gb
Hd6700 512mb
I installed windows 10/8 and but no sound I installed many driver but nothing I searched google I found legecy mode working all driver but how to install windows 10 in legecy mode my iMac only efi support please help me
	
		
			
		
		
	
				
			21.5 inch
4Gb
500Gb
Hd6700 512mb
I installed windows 10/8 and but no sound I installed many driver but nothing I searched google I found legecy mode working all driver but how to install windows 10 in legecy mode my iMac only efi support please help me