OS X Mavericks download

Unless you kept a copy of the older installer archived, then you won't be able to download the unpatched version today because Apple only provides the most recent version of the OS to download which includes all the update patches.

Unfortunately macOS 10.9 Mavericks is the one OS which Apple does not to be downloaded today.

Refer to a suggestion from @BobHarris is another related question

Can I buy Mavericks somewhere? - Apple Community

It's no longer available. Any Mac model compatible with Mavericks can run Yosemite and El Capitan.

(242286)