Im here again. I just did something bad, trying to solve things. Im not enough experienced , i guess.
My problema was: i had C: Windows 190 gbs // D: mac 100 gbs. I wanted Mac with a lot more gbs, since Windows i only wanted for some applications, nothing more.
After think a lot, i said myself: " I can re-install Windows in C, formating C before. After that, with the Windows disk utility, i can reduce the size a lot, then ill have Windows with 50 gbs + other partition + mac partition. Then i could join both partitions (the new one+mac) to make a higher mac one."
Well, i did it..., i installed Windows in C, i reduced the C size a lot. When i went to boot mac... it doesnt exist. Windows boot automatically, no options to boot mac. What i did wrong, and what can i do?