A search with grep mkey or ckey give sooooo much files .... can you give me more advice?

Thanks for your advice, i will try this search (Ckey, Mkey)

Thanks for your reply,
Im sure that it was stored with another name ...with other extension.
I didnt have the original PC that was under windows.
I have only 4TB HD full of programms and scripts... manualy i need months or years to check it.
I know i received a compressed file that installed (Berkeley, Python, PHP, Perl) on my disk and generated the Wallet.dat and i generated the Paper Wallet too (26 position starting with 21F).
It was in 2009 so im not able to remeber the wallet desktop i used ... i remeber only i buy It from a french company in Paris but i cant find the name ...
Currently I use a Mac and i make some terminal find and greps but its hard if you dont know what to search...maybe is it a word that is only used in Wallet.dat file that i can search?
i tried words like sha256, privkey, bitcoin, wallet ...
i know i had a copy of the original install programm too ...but didnt find it too.
The other problem is that i changed each year my computer and the username, i have a time machine save on another HD with 4 TB ... but its not easy the OSX changed 5 times since 2009 and i use actualy High Sierra, and the permission find on time machine save is not working pretty good (with sudo i have a lot permission message).

Thanks for your advice but i didnt find this files ....

I need your Help !!!
I Buy in 2009 some bitcoins without any knowledge.
Today I want to recovery my Wallet ... but i didnt find it...I renamed the file and im not able to find it.
I have a Big Extern HD with a lot files and im not able to find it.
I know only that i have (Berkeley, Phyton, Perl, JS) and i have a lot files.
I dont now where i buy it and i lose a second copy (Wallet Paper) ... but I have the number that was on it.
Problem i dont know how i can use this code (starting with 21F .... total length 26)
And maybe i have a copy renamed of the wallet.dat but renamed and im not able to find it.
Im sure that it was stored with another name ...with other extension.
I remeber only i buy It from a french company in Paris but i cant find the name ... and i received my Bitcoin in a self extract Email.
Currently I use a Mac and i make some terminal find and greps but its hard if you dont know what to search...maybe is it a word that is only used in Wallet.dat file that i can search?
i tried words like sha256, privkey, bitcoin, wallet ...
i know i had a copy of the original install programm too ...but didnt find it too.
The other problem is that i changed each year my computer and the username, i have a time machine save on another HD with 4 TB ... but its not easy the OSX changed 5 times since 2009 and i use actualy High Sierra, and the permission find on time machine save is not working pretty good (with sudo i have a lot permission message).
1 Bitcoin Reward for the one that give me the right advise that give me the recovery and use of it.
Thanks in Advance