The OS X operating system will now be released in October. The announcement caused the firm’s shares to drop nearly three percent yesterday to $89.51 from $92.19, according to Reuters.
The firm claimed that though the iPhone would be launched on time, ensuring this happened contributed to the delay of the next version of the operating system (code named Leopard) as resources had to be diverted away from its development.
"iPhone contains the most sophisticated software ever shipped on a mobile device, and finishing it on time has not come without a price. We had to borrow some key software engineering and resources," said Apple in a statement.
Leopard is expected to include a file back-up feature called ‘Time Machine’ and improvements to its e-mail and instant messaging software. Another feature will allow users to move from their usual desktop view to an archive style view, which will show every change made to a particular file.