and as a side note, don't actually remove the smartcard hook from your servers as mentioned as a work around if you need smart cards to work on that server for any type of client. Not that the Mac client works very well with smart cards / CAC in the first place. Greg On 7/27/07, Jim Kenzig ThinHelp.com <jkenzig@xxxxxxxxx> wrote: > > CTX113825 - The Presentation Server Client for Macintosh Is Consuming CPU > > This document was published at: > http://support.citrix.com/article/CTX113825 > > Document ID: *CTX113825*, Created on: Jul 26, 2007, Updated: Jul 26, 2007 > > Products: Citrix Presentation Server 4.5 for Windows Server 2003, Citrix > Presentation Server 4.5 for Windows Server 2003 x64 Edition > > > *Symptoms* > > The Presentation Server Client for Macintosh is consuming CPU when > connected to Presentation Server 4.5. > > *Cause* > > The issue occurs because the server refreshes the smart card reader state > more frequently than necessary. This occurs even if smart cards are not > being used. > > *Workaround* > > *Caution! This workaround requires you to edit the registry. Using > Registry Editor incorrectly can cause serious problems that may require you > to reinstall your operating system. Citrix cannot guarantee that problems > resulting from the incorrect use of Registry Editor can be solved. Use > Registry Editor at your own risk. Be sure to back up the registry before you > edit it. * > > Disable the SmartCard Hook entry in the registry on the server: > > HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\CtxHook\Appinit_Dlls\smart card hook > > Set "Flag" value to 0 (Zero) > > *Resolution* > > This issue is addressed by the following hotfix: > > CTX113387 – Hotfix PSE450W2K3015 - For Citrix Presentation Server 4.5 for > Windows Server > 2003<http://support.citrix.com/article/entry.jspa?entryID=13551> > > CTX113389 – Hotfix PSE450W2K3X64006 - For Citrix Presentation Server 4.5 > for Windows Server 2003 > x64<http://support.citrix.com/article/entry.jspa?entryID=13625> > > > > -- > Jim Kenzig > Microsoft MVP - Terminal Services > http://www.thinhelp.com > Citrix Technology Professional > Provision Networks VIP > CEO The Kenzig Group > http://www.kenzig.com > Blog: http://www.techblink.com