﻿id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
12736	"MacOSX 10.8 Guest crashes after EFI Boot with ""Divide"" error after upgrading from 4.3.6 to 4.3.8 [FIXED in SVN]"	ThetaPhi		"I know, those requests are closed quite often with ""running MacOSX guests is not supported"", but this is a new regression with a guest that was running before the upgrade.

See the attached screenshot of the guest window. After failing. The OSX guest is booting with EFI and is an unmodified OSX/Darwin installation, so definitely no Hackintosh! The ""Divide error"" occurs directly after EFI handling over to Darwin, no additional log output.

The strange thing is: This only happens on one host CPU type (Intel(R) Xeon(R) CPU  X3440 @ 2.53GHz), on my other computer (Intel(R) Core(TM) i7-3610QM CPU @ 2.30GHz) the guest starts after upgrading 4.3.6 to 4.3.8 like it did before. 

I also attached the VBox log of the failing guest.

This could be related to ticket #8651 - the failing CPU has no SSE4 features, but the working one has. But I did not enable this experimental feature! It is the unmodified guest VM reverted to snapshot that was running before.

After downgrading virtualbox to 4.3.6, it is booting again."	defect	closed	other	VirtualBox 4.3.8	fixed			other	Linux
