Apple is recommending Mac users update their systems after revealing that hackers exploited two vulnerabilities in its software.The company issued two bug fixes on Tuesday addressing issues in WebKit and JavaScriptCore, which power Safari and other web content. WebKit, in particular, is a major target for hackers aiming to exploit the engine to infiltrate devices and gain access to private data.In the first instance, Apple said one issue stemmed from "processing maliciously crafted web content," which can l ...