Fix startup problems on Mac - Dell U2713H

The monitor has arrived fresh today and makes the processing and image quality a good first impression, however, there may be beginning to make Mac models have problems and I have them all promptly caught. ;-)
In this case it is a MacBook Air 13 "(2011) with Mini DisplayPort connector. The problems are not directly on the monitor, but on OS X itself, nevertheless it is a little annoying. Googling and search for a little forums I found a tutorial that has helped me to circumnavigate the problems and to get everything up and running as desired:

Overall, there are two problems:
1) The monitor will turn after booting or waking from sleep again in the sleep mode
2) There are significant problems with the edge representation (YCbCr color space) and colors (RGB color space)

First, you should buy a possible mini-DisplayPort to DisplayPort adapter cable that the DisplayPort 1.2 standard support (which is not the case with the supplied cable). The available at Amazon cable (StarTech.com DisplayPort to Mini DP ADAPTE) works perfectly for this. It may well be that the cable may not be necessary because I had read but before the monitor purchase in various forums this recommendation to troubleshoot, I had it right a precaution ordered (at a price of about 10, it does not fall in any case particularly to the weight).

"Out of the Box" says Mac OS X Dell U2713H only to YCbCr color space, which is not as extensive as the RGB. Therefore, edge effect (especially with text) hakelig as with bad antialiasing. This little detail can make the work almost unusable to monitor when connected via the Mini DisplayPort on OS X already, because reading texts is quite unpleasant in the long run. Luckily, there are on this site a patch that forces the monitor RGB mode under OS X: http://embdev.net/topic/284710#3027030 (File: http://embdev.net/attachment/168316/ Patch edid.rb) After downloading simply run the Ruby script in the terminal (`ruby patch edid.rb`), a previous backup is unnecessary because only additional files will be recreated. The generated folder (here DisplayVendorID-10ac) move to / System / Library / Displays / Override (admin password of the computer is required) and then restart the computer. When booting delete the parameter RAM of your Mac by holding down the Alt + Cmd + P + R until the start-bell sounds again. Now the monitor can be easily operated in RGB mode with significantly better image quality at full resolution.

If you later want to re undo this change, the generated folder must simply be deleted and only the restart with the above key combination to be rerun.