Error while deleting partitions on disk utility
I was trying to install windows 10 with bootcamp without an external driver. It went to disaster so i wanted to delete all the partitions and just keep the mac os one , in the disk utility the"-" in the windows partition isn't showing and with the microsoft reserved when i try to delete it it says operation failed. please can someone help me to delete the partions and thank you
MacBook Pro with Retina display, macOS Sierra (10.12), 13" early 2015