I need to download iMac OS X 10 . Who can help me with this?

To perform this action will require booting from a Bootable Installer. 

The Bootable Installer can Only be performed on an Apple Computer 

This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer.

Example Only: Bootable Installer of High Sierra would have to be done on a computer that Qualifies to run High Sierra.

Notation: If the computer being used to perform this action is Too New or Too Old to qualify to run the version of macOS - this computer can not be used.

Alternative is, to gain access to a Qualifying Apple Computer from a family member, friend or associate.

Ok, chelsa289, i’d be delighted to help you out with that… here’s how ( see link) … ideally you should use Safari for download as the article has links that’ll open in the App Store… How to get old versions of macOS - Apple Support

i’d stay away from yosemite as it had a nasty wifi bug..

El capitan should be a-ok though

hope this helps

john b

MacOS 10.0 was Cheetah and was only available on CD (I not think it was even DVD).

You need to find a Cheetah disk. Try eBay or maybe Craigslist. It was never available as a download.