Today, that I have had some time, I have started to find out how I could use the screen of my new 21'5 ”iMac with my 11” MacBook Air, so that I can work directly with the laptop but with the screen of the desktop.
I usually use the laptop when I go to work so that I can generate multimedia content and notes for the students. However, when I get home, I usually do not use the desktop to do work but for leisure, although sometimes I have been forced to do so.
In those cases I find myself copying the files, doing the work and then transferring them back to the laptop. I say transfer from one side to the other because for the video I usually have the files on the air disk because being SSD it goes much more fluid.
After doing some research, I have found a way to do it. It all depends on the iMac you have. This mode of operation is called target display and it is quite simple to use. Depending on the type of iMac you have, the cable you should use is different, so below I present a table that I have found for it:
To use the Target Display mode, just turn on the two computers and connect them with the necessary cable according to the table above. At this point what we must do now is press Command + F2 so that the iMac enters the mode we want and you can use the iMac screen as the laptop screen.
After several tests, using a cable Thunderbolt Thunderbolt picture and sound pass through smoothly. However, to control the brightness of the iMac screen I must do it with the keyboard of the desktop itself and not from the laptop.
Now I am and you are ready so that when the need arises you can work from your laptop but with a good screen.
More information - Apple Thunderbolt Display Begins to Run Out at Authorized Resellers
Source - Apple