how to upgrade osx 10.5.8 to yosemite

I am running an imac with osx 10.5.8 and experiencing a lot of problems with safari, adobe flash updates, and compatible versions of programs like CCleaner and Avast antivirus.  What do I have to do in order to upgrade the osx operating system to a newer version of the osx?  Also, the computer has 1 GB of RAM and it is an intel core 2 duo at 2.40 GHz.
Richard ChristensenRetired computer technicianAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Kanti PrasadCommented:

1 GB ram would not be enough and you need to first upgrade to Snow Leopard, OS 10.6.0 and then to OS 10.6.8 and then to yousemite.

The below links will give you the pathway

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Richard ChristensenRetired computer technicianAuthor Commented:
Excellent answer.  Thanks!
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Mac OS X

From novice to tech pro — start learning today.