Apple uses its Mac App Store program as the means for providing not only third-party software, but also OS X system software and updates. When you choose Software Update from the Apple menu, the system will open the App Store, which will check the computer for all software purchased and managed through the store. However, in some instances the download doesn't complete and the program may even hang, showing a spinning pinwheel cursor. You may not even be able to restart your computer, which obviously can be frustrating to deal with.
There are a couple of approaches you can … Read more