U.S. investment institutions are lowering their outlooks for Apple’s business performance in the third quarter of this year.

In a recent report, investment bank William Blair lowered its prediction for Apple’s quarterly sales of the iPhone from 33 million to 26-point-five million.

Investment firm Gabelli also revised down its forecast for Apple’s sales of Mac computers from over 32 million to 29-point-nine million, noting a declining global demand for personal computers.

Apple will announce its business result in the third quarter on October 25th.