New Yosemite installation was working perfectly until...........

[Kingzone]

My latest build had been working fine until I realised the USB3 ports were not working so using MultiBeast I installed the universal USB3 kext's. Now everything is stable until I turn on my USB printer or insert anything in the USB ports, when I do the machine instantly freezes. If I turn the printer on before I start the machine it boots OK but freezes shortly after reaching the desktop.

This build is using an MSI Z97M Gaming motherboard.

 

[Kingzone]

My latest build had been working fine until I realised the USB3 ports were not working so using MultiBeast I installed the universal USB3 kext's. Now everything is stable until I turn on my USB printer or insert anything in the USB ports, when I do the machine instantly freezes. If I turn the printer on before I start the machine it boots OK but freezes shortly after reaching the desktop.

This build is using an MSI Z97M Gaming motherboard.

I have now removed the Universal USB3 Kexts but the problem still exists. When I insert any USB device into a USB 2.0 or USB 3.0 port the machine freezes and I have to reboot using the power button. Other than this the machine is perfectly stable.

Does anyone have any idea's why this is happening?

 

[Anachronaut]

No idea why this is happening, but I have found this to work in Yosemite where the MultiBeast supplied USB3 kext did not:

Patched AppleUSBXHCI v710.4.11 (10.10.5)

You could also try resetting optimized defaults in the BIOS and then resetting the necessary items for your motherboard before booting.

 

[Kingzone]

[SOLVED] New Yosemite installation was working perfectly until...........[SOLVED]

After advice I downloaded and ran 'Kext Utility', this seems to have cured the lockups and the machine is once again stable.