﻿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
