To work with Vmware I had it in the past , but after the system wanted me to do some updates the vmware crashed and sience then I don't have the MAC IOS installation anymore could someone please help ?
Once you hear the startup tone hold down the Shift key on your keyboard. When the grey Apple logo appears, release the Shift key. Once in safe mode delete any unnecessary files, or move them to an external hard drive, to free up some disk space. Then restart your Mac and try to install macOS Sierra again.
