Unable to update Mac OS 10.7.5

Question

I am trying update my iMac OS from 10.7 to 10.7.5. I've downloaded the MacOSXUpdCombo10.7.5.dmg file, but when updating, it gives an error like:

Mac OS X Update Combined can't be installed on this disk. This volume does not meet the requirements for this update.

What can I do to successfully update the OS?

Have you already tried updating using Software Update ( Apple-menu > Software Update)? If yes, what happened? Have you already tried booting the Mac from the Recovery partition and running Disk Utility's 'Repair Disk' function? (Restart Mac while keeping Option(Alt) key pressed, click 'Recovery HD'...)
i tried it but Mac OS not updated when i am updated Apple-menu > Software Update)
Repairing your disk using Disk Utility should help. If it doesn't, try using the 10.7.3 Combo /Client/ Update (support.apple.com/kb/DL1484) which is known to help.

Pro Backup · Answer 1 · 2013-04-16 17:38:37Z

Make sure that your have downloaded the correct combo updater:

OS X Server should have the 10.7.5 Server Combo updater = DL1585 ≈ 1.99 GB
OS X Client should have the 10.7.5 Client Combo updater = DL1582 ≈ 1.91 GB

To determine whether the client or server version is installed on your Mac, use the Terminal command: $ /usr/bin/sw_vers

Example output for 10.7.5 Server:

ProductName:    Mac OS X Server
ProductVersion: 10.7.5
BuildVersion:   11G63

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