I have a mid 2010 mini running 10.13.6. Am trying to install Win 10 thru Bootcamp. After Windows Partition is created and boot into Windows installer, will not allow install, says Selected Disk is of GPT Partition Style. Next button to continue install is greyed out. I have tried, as other sites suggest, to create partition thru Disk Utility and format as exFAT and install onto that, same result always. I am installing from optical drive. Any assistance would be greatly appreciated.