Apple has withdrawn Virex 7.5 from .Mac, citing "technical issues".
The software was made available to .Mac subscribers last week, through the Members Software folder.
A note on the company's site recommends users who have installed the updated virus protection software to uninstall it.
Apple says: "Due to customer feedback and technical issues currently under investigation we have temporarily discontinued distribution of Virex 7.5 from McAfee until further notice."
The company promises to make previous version of the software, Virex 7.2.1 available to members, and is offering a script with which to uninstall the software.