Owners of older Macs or those with out-of-date versions of Boot Camp are being blocked from updating Windows 10 to version 1903.
Users of affected Mac devices that use Boot Camp attempting the update will see an error message warning about a problem with the Mac HAL driver ‘machaldriver.sys’ on their Windows 10 installation. “Your PC has a driver or service that isn’t ready for this version of Windows 10,” the message reads.
“No action is needed. Windows Update will offer this version of Windows 10 automatically once the issue has been resolved,” it concludes. Microsoft advises it is working on a resolution and estimate it will be available in late July.
Read more at AppleInsider.com