The problem, which appeared on dual 1.8GHz machines, created a beeping or hissing noise on some machines when used in conjunction with professional external audio gear, according to reports on Macintosh enthusiast sites including Think Secret and Macworld UK. The issue has also been a frequent topic of discussion on Apple’s support site.
An Apple representative told CNET News.com that a “small number” of customers have experienced the problem, which has been fixed in production. The company said any customers experiencing the issue should contact the company’s customer support.
Visit CNET News.com for more on this story.