How do I get a better version for my mac os 10.4.9

The iBook G4 is a powerPC build, and cannot run an OS X past 10.5.8;

so if you want to run OS X 10.6.8 or Later, you'd need to buy a Intel-based

computer model, made from about 2006 and later.

The PPC Macs can only upgrade to Leopard 10.5.8, and the means was

by retail DVD; then an update to get the last steps was by download.

Both the iBook and PowerBook G4 models came to a close with the introduction

of the MacBook series; the MacBook series (not Pro or Air) came to a close in

the year 2010; so there are not new basic MacBook models. There are MB/Air

and MB/Pro; though there are some companies who repair & sell fixed old ones.

So the newer Apple portables, in the online Store and in refurbished store online,

plus in retail locations, can give you a later version for sync with iPad, iPhone,

App Store, iTunes Store, Mac App Store; among other later features.

•Refurbished and Clearance iPod, iPad, & Mac Products - Apple Store (US)

http://store.apple.com/us/browse/home/specialdeals

{These qualify for a complementary support/service; &

for an optional AppleCare plan, same as new models.}

There are third party sources for repaired, restored, refurbished used Apple

products; be wary of auction sources, most sellers aren't knowledgable nor

do they offer any support or service beyond your hope to get money back.

For the low-cost older computer product with limited future prospects, you

can usually get an Intel-based Mac that can run at least Snow Leopard;

see companies such as macsales, wegenermedia, powermedic, & etc.

You can research vintage, obsolete, and supported models by reading

through everymac.com, apple support, mactracker.ca download, etc.

Good luck & happy computing! 🙂