There is nothing you can do. 
Given you have already attempted data recovery... and no doubt been using the computer for things in the last 8 years, even indepth forensic analysis would be unlikely to yield the private keys or wallet file.
Unless you want to pay a professional data recovery service to attempt that sort of thing (VERY expensive)... and you're trying to recover a sum of BTC that is worth considerably more than that cost, it just isn't worth it.
1- If I did not export my private key or my wallet, there could have been an export when I made sub-sub exchanges?
No. At best, the application might have made a rolling backup of your wallet file.Quote
2- I searched my MAC, the hidden location of the software and nothing.
3- I searched for deleted files with software but no wallet or private key.
Can you give me some ideas? methods to find my BITCOINS?
Without the private key(s), even if you know the address, you cannot spend/move the coins... all you can do is look at them... and that will drive you crazy. You're better of just letting it go, tbh.3- I searched for deleted files with software but no wallet or private key.
Can you give me some ideas? methods to find my BITCOINS?
Given you have already attempted data recovery... and no doubt been using the computer for things in the last 8 years, even indepth forensic analysis would be unlikely to yield the private keys or wallet file.
Unless you want to pay a professional data recovery service to attempt that sort of thing (VERY expensive)... and you're trying to recover a sum of BTC that is worth considerably more than that cost, it just isn't worth it.