Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Redesigned Apple Earphones To Be Launched [Images]
We have only ever seen two versions of the Apple in ear headphones the first being released in 2007 but were soon refreshed after multiple complaints from customers about the headphone constantly falling out. The refreshed versions were released and solved the previous problems but still did not sound the best especially for the price.
The images below show what is rumored to be the next generation Apple in ear headphones. They seam to be a mixture of both previous version. We have no details at this moment in time regarding price or availability.