An update from Apple for its OS X 10.6 operating system could cause a lot of grief for tinkerers who have installed Snow Leopard on low-cost netbook computers. The update may cause Snow Leopard to no longer run on Intel’s Atom processors. Withdrawing Atom support would prevent device hackers from creating so-called hackintosh netbooks. Apple has changed around a significant amount of CPU-related information in the latest build for Snow Leopard, according to a blog post by the hacker Stellarolla.