I can't open an excel spread sheet because it says file is damaged or modified.
12.3.4 is the Excell version I have for Mac.
I tried what you said. But the problem is that if I just click on >Open, the file I am looking for is not there. It is there when I click on >Open recent....and that is when I get the message that the file can't be opened.
The Open recent file I need has the extenion xlsx. That is the one I need to repair.
The one that is available but is not the correct one has the extension xls.