C to displayport cable or adapter.
													
																	Macbook pro displayport adapter not working. 
									
	
		
	
																	This is the correct solution for the apple led cinema display. 
																	Definitely make sure you use a true thunderbolt cable with a thunderbolt icon on it and not a random old mini displayport cable with a rectangular monitor icon. 
																	Another question will be whether your macbook pro can actually support a 4k device at full resolution. 
																	Check with its manufacturer for compatibility with your mac and display model. 
															
													
									
	
		
	
																	Try using a different cable that you know is in working order. 
																	It was working fine a few hours ago at work i got home and plugged in the external display as usual and turned on the machine and nothing. 
																	I bought 2 new macbook pro 13 2 9 ghz intel core i7 with 8 go 1600mhz ddr3 intel hd graphics 4000 512 mb mac os x lion 10 7 4 11e2617. 
																	For example a mini displayport to dvi adapter can t be connected to a dvi to hdmi adapter. 
															
													
									
	
		
	
																	If your display has more than one video connection see if using another connection on the display works. 
																	Using the detect displays does nothing. 
																	A bit ago i purchased myself a macbook pro 15 2016. 
																	I have connected a mini displayport to vga adapter in order to show presentations on different lcd projectors but no image appear. 
															
													
									
	
		
	
																	If you re using a mini displayport cable with a mini displayport display use a third party usb c to mini displayport adapter. 
																	The external monitor is detected but no image is shown. 
																	The macbook pro was running sierra as operating. 
																	It was a usb c to displayport adapter after which i used a displayport cable to connect it to my external uhd monitor philips brilliance 288p. 
															
													
									
	
		
	
																	Mini displayport is not the same as thunderbolt or. 
																	A 61 watt power adapter. 
																	The thunderbolt 3 ports in the macbook pro and macbook air work with usb c devices which have the same connector shape. 
																	I purchased an adapter so i could connect it to my external monitor which functions perfectly.