The first place to check on your device for a recovery version on a Mac is your Downloads folder. Usually these files are deleted, however it is worth a check just in case!

If there is no file in your Downloads, you can check the temporary files. To do this please perform the below:

1) Open Finder
2) Click Go > Go to Folder from the top menu bar.
3) Type in "/private/var" and hit Enter.

4) Open the Folders folder

In here are randomly named cache folders, so we might need to do a bit of searching about.
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Open the folders (such as "pp" or "zz" and look for another folder that was modified about the same time you last had your document open.
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Open this folder (it will be called something like "wd_sufns98734lkjsdf987" etc.), and look for a folder called "T"
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Open the T folder and look for another folder which will be named the title of your document.
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Within there, there should be a backup of the document if it was not able to be saved back correctly.