I was installing Win8 on a Mac where I got the error that I can because of GPT disk I dont know what MAC I have but the Mainboard is number is Apple Mac 942859f58194171B. I tried formatting the specific partition not the disk but unfortunately, I formatted the disk which contained my MAC OS together with the Recovery. I am now stuck in windows and I don't have the MAC Recovery Disk. What can I do to recover my MAC OS and potentially recovery in Windows?
The easiest way (depending on your model) is to do an Internet Recovery. You can do this by holding Command+Option+R while your computer boots. You will get a globe and will either ask you to connect to Wifi or if you are connected to ethernet you will just see a progress bar. After it downloads it will bring you to the recovery partition and you can re-partition your HDD and such.