I can't upgrade to Mavericks

Before you do, be sure you are ready in terms of software compatibility:

https://discussions.apple.com/docs/DOC-6271

Next identify your Mac, as this tip explains:

https://discussions.apple.com/docs/DOC-6413

Next read if you really are compatible:

http://www.apple.com/osx/specs/

Next backup your data:

https://discussions.apple.com/docs/DOC-1992

Then if you are compatible, see this tip:

https://discussions.apple.com/docs/DOC-6131

OS X Mavericks: System Requirements

>>MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)

The message from App Store may be a little misleading, since core 2 duo processors were in macbooks before 2008, and yet they are not suitable for Mavericks.

What year/model is your macbook ?.

To check the model number hold down the option/alt key, go to the Apple menu and select System Information.

Your Mac is too old to install and run the free OS X 10.9 Mavericks.

You can purchase a download code from Apple and download and install OS X 10.7 Lion.

http://store.apple.com/us/product/D6106Z/A/os-x-lion

OS X Lion system requirements

To use Lion, make sure your computer has the following:

• An Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
• Mac OS X v10.6.6 or later to install via the Mac App Store (v10.6.8 recommended); you can install without Mac OS X v10.6 by using an OS X Lion USB Thumb Drive, available on the Apple Online Store
• 7 GB of available disk space
• 2 GB of RAM

If your Mac does not meet these requirements, you will need to upgrade your Mac before installing Lion.

It would be very prudent and advisable to create a viable backup of your current system and all your important data before embarking on a major systems upgrade in case something bad or unforeseen happens and also, in the event, you simply do not like the new OS.

Good Luck!

No.

Your Mac can only be upgraded to OS X 10.7.5 Lion, max. That is as far as your Mac can be upgraded.

Your Mac is too old to install and run OS X 10.8 Mountain or 10.9 Mavericks. You cannot install and run these or any future OS X upgrades.

A 2006 cannot install Mavericks. I'd stick with Snow Leopard unless you've a very pressing need for something in Lion.

Agreed with Michael and Andy. Unfortunately the Apple Store is indeed misleading, and I've let the authorities know. 10.7.5 is the absolute maximum your Mac can take.

Qualified MacBooks for Mavericks start at the late 2008 models which are the aluminum models and not the older white polycarbonate models.

And No.

You can't just replace hardware in one Mac for another. Not possible and it seems from your question, you would have no idea how to do that, even if it was possible to do, anyways.

If you really think you have a need for OS X Mavericks, you can either buy a new MacBook from Apple or if your in the U.S. check Apple's refurbished section of their website for deals on MacBooks or you can search for online Auhtorized Apple resellers for used Macs and purchase a used, but newer Mac from a Mac resellers.

Mac resellers will have limited warranties ( and even paid extended warranties) for the used Macs that they sell.

Stay away for purchasing a Mac from a private source or a source like eBay.

You can get screwed and there are NO warranties if somebody sells you a defective Mac

Macs ARE NOT WINDOWS PCs.

The hardware conponents of a Mac cannot be simply switched out and used in other Macs.

You cannot simply build a Macintosh, especially a Macintosh laptop, in the garage or basement.

NOT gonna happened. NOT gonna do it.

The hardware and software architecture are closely integrated for every new Mac model year.

There is absolutely no way to do what you are implying or suggesting.

Again, if you have a pressing need to have and run OS X Mavericks, you will need to purchase a new or newer MacBook. Plain and simple as it gets.