Microsoft Version for iMac 2009

Your computer is very very out of date and has been considered obsolete for many years now. In addition it is reaching the age where getting compatible software that is supported is a problem. You can look for alternatives such as the free web based MS Office clones or even using Pages & Numbers which is Apple's alternative or searching E-bay for old versions of Office for Mac that are supported by your current OS but that is dicey.

Of course, it may also be wise to consider just replacing the old computer as this problem will not be getting any easier to solve.

Good luck.

An alternative to a new iMac, is a newer model than what you have, like a 2013 or 2015 model. You might find a good deal on a used or refurbished Mac that still has some life in it that is also compatible with the latest macOS and Office, and of course, any essential Will Writing and Tax Preparation software, so you can be prepared for, you know, death and taxes, which are about as certain as computer obsolescence. :-)

https://eshop.macsales.com/configure-my-mac/imac?gclid=EAIaIQobChMItLOcg-2P5QIVGh6tBh2KPQSvEAAYAiAAEgKsD_D_BwE&gclsrc=aw.ds

For a list of detailed specs of past Mac models, to help you compare:

https://everymac.com/systems/apple/imac/index-imac.html

Well remember Apple does sell refurbished models at a discount and if you have okay credit you can finance interest free for up to 18 months. There is no downside to an Apple refurb, identical to a new one, same warranty as a new one, eligible for AppleCare and can save hundreds of $$.

You can fine them by going to Apple.com, navigate to the bottom of the home page and click the Refurbished section.