Apple Computer on Friday issued an update to Mac OS X to address flaws that security firms said could allow malicious code to be run on a Macintosh. The update fixes a pair of flaws that could be used to create a virus that spreads through a Web link sent via e-mail messages. An attacker also would have to create a Web site with special programming to exploit the vulnerability. The issue was made public this week, although the person who discovered the problem claims to have notified Apple in February. Security information service Secunia on Tuesday rated the issue...