

This will update your system to 10.9.2, even when OS X 10.9.3 or later are the only options available for download through Software Update. For example, for OS X 10.9.2, search the page for “OS X 10.9.2 Combo” and then download the disk image, open it, and run the installation package contained in it.
INSTALL MAC OS X 10.7.5 INSTALL
However, if you would like an intermediary version, then you can download and install the Combo updater for the desired version from Apple’s Support Downloads Web page(). If you simply need the latest version of OS X, then you can use Apple’s software update to get the most recent versions of all Apple-provided software. After restarting, check the version of OS X that was installed, which can be seen in the “About This Mac” panel in the Apple menu. This process should only replace system files on your Mac, leaving user accounts, settings, and installed applications intact.

