My computer will not update to the new software from 10.5.8, I check for updates and it says none available? What can I do to download new OS X Mavericks?

Click here and read the entire page. Mac OS X 10.7 and newer don't support PowerPC software such as Microsoft Office 2004.

What year, screen size, CPU speed and amount of RAM installed?

To find out info about your system,

click on the Apple symbol in the upper left of the OS X main menu bar. A drop down menu appears.

Click About this Mac. A smaller popup window appears. This gives you basic info like what version of OS X your iMac is running, the speed of your iMac's CPU and how much RAM is installed.

Click on the button that says More Info. A larger window appears giving you a complete overview of your iMac's hardware specs.

Highlight all of this info and copy/paste all of this into another reply to this post, editing out your iMac's serial number before actually posting the reply. This will tell us everything about your iMac so we may begin to help with your iMac issues.

Depending on your year and model iMac, you may need to upgrade your iMac's RAM before upgrading your iMac's OS X version.

Correct and reliable Mac RAM can be purchased from online Mac RAM sources Crucial memory or OWC (macsales.com).

If your iMac is a 2006 or newer Intel Model iMac, you can purchase and install OS X 10.6 Snow Leopard.

Snow Leopard is a paid upgrade found here.

http://store.apple.com/us/product/MC573Z/A/mac-os-x-106-snow-leopard

Once initially installed! you can OS X Sofware Update feature to update the OS X version to OS X 10.6.8 and update all of your installed Apple Sofware and security updates. The update to OS X 10.6.8 gets you access to the Mac App Store.

If you iMac models meets OS X 10.9 Mavericks hardware requirements, you can go directly from OS X 10.6.8 to OS X 10.9 Mavericks by going to the Mac App Store and downloading and installing the free OS X 10.9 Mavericks to your iMac.

Before doing any major Mac OS system upgrade or update! it is strongly recommended that you have a backup of all your important data in case something should go wrong during the download and install process.

Backups should be on CDs/DVDs, large storage USB flash drives or externally connected hard drives.

You can create a backup using OS X Time Machine data backup app (part of OS X ) or data cloning apps, Carbon Copy Cloner or Super Duper to create a bootable, exact data clone of your Mac's internal hard drive and clone it either a large capacity USB flash drive or externally connected large capacity hard drive.

Good Luck!

You won't be able to upgrade to OS X Mavericks if your computer is running 10.5.8.

You will have to purchase OS X Snow Leopard from the Apple Online Store firstly and then upgrade to 10.6.8. Then you can upgrade to OS X Mavericks for free.

I have this same question. But my computer was all up todate and everything was working just fine until someone used the reboot discs that came with the computer. I bought my computer back in 2008. Is there a way to update my software without purchasing Snow leopard?

No.