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Mac Pro computers reportedly won’t boot after new OS X 10.7.5 Lion update

Updated 4 years ago

Wednesday was apparently not Apple’s (AAPL) best day when it comes to software updates. First, iOS 6 users were sent into a frenzy when Wi-Fi connections stopped working after they updated to Apple’s latest mobile OS. Thankfully, the problem turned out to be an issue with Apple’s website rather than iOS 6 itself, and the issue was resolved within about an hour. Now, what appears to be a far more significant issue has emerged following Apple’s release of OS X 10.7.5 Lion on Wednesday.

According to several accounts on Apple’s support forum and on a number of other forums, some Mac Pro users are unable to boot after installing Apple’s OS X 10.7.5 Lion update. To compound matters, standard solutions such as flushing the system’s PRAM and booting to a recovery partition do not appear to work. The problem seems to only affect older Mac Pro machines and no clear solution has been found at this point.

Apple has not publicly commented on the issue.

Zach Epstein
Zach Epstein Executive Editor

Zach Epstein has been the Executive Editor at BGR for more than 10 years. He manages BGR’s editorial team and ensures that best practices are adhered to. He also oversees the Ecommerce team and directs the daily flow of all content.

Zach first joined BGR in 2007 as a Staff Writer covering business, technology, and entertainment. His work has been quoted by countless top news organizations, and he was recently named one of the world's top 10 “power mobile influencers” by Forbes. Prior to BGR, Zach worked as an executive in marketing and business development with two private telcos.