A number of criticisms have been placed upon Windows Vista, including the inclusion of a number of technologies aimed at restricting the copying of digital media and the usability of the new User Account Control security technology. Reviewers have also noted similarities between the Vista interface and that of Apple's Mac OS X operating system.
One of the most common criticisms is against the integration of new forms of "Digital Rights Management" into the operating system, specifically High-Bandwidth Digital Content Protection (HDCP), which reduces the quality of high-definition video content if the video card and monitor are not HDCP-enabled, of which, as of May 2006, there are none.
The new User Account Control (UAC) security technology also causes concern among reviewers. While analysts Yankee Group believes that critical security vulnerabilities may be "reduced by as much as 80 percent", Andrew Jaquith has predicted the new UAC security system "is going to really annoy users" by being "far too chatty". Yankee Group recommends business users steer clear of Vista until 2008 and "should also take a look (at) Apple's dual boot Intel Macintoshes".
Another criticism is a claim by some including PCWorld's Scott Spanbauer that Windows Vista has similarities with Mac OS X. Spanbauer specifically notes a "striking similarity" between Aero's visual effects, icon design, buttons and those of Mac OS X's Aqua. Paul Thurrott of WindowsITPro, made similar comments in his review of build 5308, while also suggesting that some of the new applications "appear to be directly, ahem, influenced by similar applications in OS X" John Rizzo of eWeek has noted that Vista is incorporating features which OS X has had for some time, such as fast searching and Smart Folders functionality. This has led some Macintosh enthusiasts to the conclusion that Aero is a deliberate imitation of Aqua. Some reviewers also see the Vista "gadgets" as being similar to OS X 10.4's Dashboard and Konfabulator widgets, though early development builds of Longhorn had included such functionality as early as September 2002, before either product had been released.http://en.wikipedia.org/wiki/Windows_Vista#Criticism