Mac Forum / Applications / Virtual PC / October 2004

There is another option, although I haven't got VPC7 or a G5 to try it
on. This (a repost of something I posted about 3 weeks ago) is from
MacMinute.com ...

   Microsoft confirms Virtual PC RAM issue; update coming
   ------------------------------------------------------
   Microsoft has confirmed to MacMinute that its recently
   released Virtual PC 7 will not work with Power Mac G5s
   with more than 2GB of RAM installed. "Microsoft is aware
   of this important issue, which will affect a small
   percentage of customers, and has made it a high priority
   to address as quickly as possible," a Microsoft
   spokesperson told MacMinute. The software giant said
   that an update to Virtual PC 7 is expected within the
   coming weeks that will solve the problem. In the
   meantime, Microsoft is recommending the following two
   options as a workaround:

   1) Remove a specific Mac OS Kernel Extension for
      Virtual PC. The method for doing this is listed
      below, but note that speed/performance will
      decrease.
 
      To remove kext:
       * Quit VPC
       * Open the /Library/Extensions folder
       * Drag the virtualpcosservices.kext file out
         to another location (like the Desktop or
         Documents folder; DO NOT DELETE IT)
       * Open the /Library/StartupItems folder and
         remove the VirtualPCOSServices folder
       * Restart the Mac

      To restore/repair kext:
       * The forthcoming update will automatically
         reinstall kext should a user pursue this
         option.

    2) Remove RAM from the first four slots to below 2GB.

Helpful Harry                  
Hopefully helping harassed humans happily handle handiwork hardships  ;o)

Hi

Does this problem effect machines with 2 Gig Ram or is 2 Gig the
maximum you can use ok.

(I ask because VPC is slow when set to 256, but slower still if you
set it to 512. This is on a dual 2GHz G5 with 1 Gig of Ram.)

We want to up the Ram to improve performance and stability as much as
possible - without running into the "too much Ram" problem. (Never
thought I would come across a problem associated with too much Ram!)

Thanks and thanks for all the previous replies to other posts.

P