⭐ Merited by Pmalek (1)
She received BCH during the original BTC fork and believe that BCH is still "on" her Ledger. I am not as well versed in the world of BCH. Are there any Ledger support BCH wallets? She has a MAC. I am going to try the old Bitcoin chrome app next time I see her.
"Ledger Wallet Bitcoin" chrome app is still functioning... I just installed it... simply select "Bitcoin Cash" here:
Then to access the BCH from the fork... make sure you select "Main" (DO NOT select "Split"):
This will show any forked coins that the device still holds. That is to say, any BCH that is sitting on BTC derivation paths (m/44'/0'/0'...). If you use "Split" it uses BCH derivation path (m/44'/145'/0'...) which will only show non forked coins.
That actually might be the easiest part. You can use Electrum to extract your bitcoin private keys, and subsequently extract any BCH that is trapped on them. As far as I know, Electrum doesn't care about firmware versions of hardware wallets. And yes, I'm bracing myself for a correction, lol. 
Nope. That won't work as you can't export your private keys from the Ledger by using Electrum. Electrum simply imports the appropriate XPub creating a "watch only" version of your wallet. So, all private key actions are still done within the Ledger itself... and part of the core of HW security is to never expose private keys 