Newest os x upgrade won't boot

I just purchased and tried to install the latest OS X upgrade, but the installer quit with an error saying there is a problem and the system can not boot. Any suggestions on how to troubleshoot a system that won't boot? I do have a backup on an external drive and I can pull off the few documents that are newer than the backup, but I would like to be able to troubleshoot this issue first if I can. Thank you for you help. Joe

If you don't already have a current backup, back up all data, then reinstall the OS. You don't need to erase the startup volume, and you won't need your backup unless something goes wrong. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it.
There are several ways to back up a Mac that is not fully functional. You need an external hard drive to hold the backup data.
1. Boot from the Recovery partition or from a local Time Machine backup volume (option key at startup.) Launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.”
2. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
3. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.

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Hi Autoexit173,
Welcome to Lenovo Community!
As per the query we understood that you are facing issue with system not booting in your Lenovo G560 laptop.
As you have mentioned that the system not booting, please try to remove the RAM and turn on the system and check if you can hear any beep sound. Also try to clean the RAM slots and check for the issue.
Click here for the steps to remove the RAM and refer page number 40.
Hope this helps. Do post back if issue persists!
Best regards,
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Hi forum
I just upgraded my laptop ge60 2oc 014ne, with two 8 GB corsair value select sticks.
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Cheers

Quote from: NexumxRaptoR on 07-November-13, 23:58:36
another thing is that you can't put in more RAM than the notebook came shipped with right?
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Newest os x upgrade won't boot

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