What is Mac HAL Driver? How to fix Machaldriver.sys errors?

Mac HAL Driver is Macintosh Hardware Application Layer Driver. It is a software component from Apple which helps install and run Windows on Macintosh. In this post, we will learn how to fix Mac HAL Driver Machaldriver.sys errors – Your PC has a driver or service that isn’t ready for this version of Windows 10 or WDF_Violation Blue Screen.

What is Mac HAL Driver?

Boot Camp is a utility that comes preinstalled in macOS. It helps you to install and use Windows on Macbook. Named as Machaldriver.sys, its a driver that allows Windows to talk to Apple hardware, and run the operating system as it would have run any hardware.

Fix Machaldriver.sys errors

Machaldriver.sys errors

Several errors had been spotted related with Machaldriver.sys. They usually occur when there is an incompatibility between the Apple Driver and Windows Driver. In this post, we will offer solutions which you can use to fix those errors.

1] Your PC has a driver or service that isn’t ready for this version of Windows 10

The full error message goes as:

Mac HAL Driver – machaldriver.sys: Your PC has a driver or service that isn’t ready for this version of Windows 10. No Action is needed. Windows Update will offer this version of Windows 10 automatically once the issues have been resolved.

The error occurs in one of the scenarios:

  • Macbook which was manufactured before 2012.
  • You are running an older version of Windows or Apple Boot Camp.

In both cases, you need to update Windows 10 and BootCamp drivers to resolve the problem.

2] WDF_Violation Blue Screen Error

The error occurs as the MacHALDriver.sys cause Bootcamp.exe to crash. It occurs after entering credentials.

To temporarily resolve the issue, you need to rename the  MacHALDriver.sys (available in the C:\Windows\system32\drivers folder) to MacHALDriver.bak.

To do so, boot into Safe Mode, and change the file name. However, once you reboot, you may lose some of the Macbook features, and the Fn keys will stop working.

Post this; you will need to wait for an update from Apple. Apple acknowledged the issue, and once the update is rolled out, you will be able to install Windows v1903 without any problem.

The baseline is that if there is an issue, its mostly the driver, and compatibility issue. You will have to wait for an update to arrive and only then it can be resolved.

Posted by on , in Category Windows with Tags
Anand Khanse is the Admin of TheWindowsClub.com, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.

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