Changes to the sandboxing rules in OS X Lion appear to be flagging files as quarantined when they've been edited by sandboxed applications, with the result that scripts and other executable files no longer work.
It seems the latest method to scam money from the innocent is to use cute doggie pics to entice vulnerable dog lovers.
Readers ask about the OS X quarantine system, hot-corner triggers, and file locks in iWork.
A British woman passionately needs her 12-year-old dachshund, Winnie, to be copied. So she wins a competition and a Korean company clones Winnie for free.
If a newly installed application just bounces in the Dock or quits, then the system may not be handling its quarantine flag properly.
A new security update from Apple blocks outdated versions of Adobe's Flash plug-in, forcing users to nab the newest version.
A new command-and-control Trojan for OS X appears to be associated with the Syrian Electronic Army.
A feature that lets you play games before they've finished downloading will debut on a PS3 game in a couple of weeks, ahead of the PS4.
The donationware ClamXav and the free Sophos Anti-Virus for Mac combine real-time protection, automatic updates, and on-demand malware scanners to help prevent infections.