Keynote update necessary but impossible
I have an iMac from 2009, which cannot upgrade beyond El Capitan.
I have Keynote 6.6.2 and cannot upgrade beyond that using OS El Capitan.
Last week I created a presentation on the iMac and delivered it from my iPad.
Today, when I try to reopen the presentation on the iMac, I am told that I cannot open it and need to upgrade Keynote. But, of course, I cannot upgrade.
This did not use to happen before the last iOS upgrade.
I seem unable to force Keynote to open with the older version. I cannot open with ppt. (When this happened before after presenting from MB Air I was able to open with ppt, save and then open with my version keynote version - this is now blocked.)
So, effectively, all my keynote documents are now useless on this iMac.
Is there any way around this?
Or is Apple trying to force me to spend money on a new computer I really don't need?
Thanks for any tips and advice. This is a serious problem for me.