Some of the plugins NLT use for Treasure of Nadia do not work on M1 Macs. If you press F5 the game reloads and reloads until all unsupported plugins are skipped - I guess.
I sincerely hope you are not doing this early in the game... aim for top tier completion rate and do not start the fishing up until you reached 85 % or so... ( doing so will grant you guide books boost luck-up boost and your own luck stat will be much higher ) This whole fishing game not just catching Bruce can be done in less than 30 minutes ( if you do it after you finished v90 your stats will be even higher so the process will be faster again... )As the 'fish lottery' is re-drawn every time you enter the beach, what I was doing was stepping in and out of the beach. If while stepping I was spotting the shape of a possible big shark, I was continuing to the shore to fish it, otherwise I was immediately stepping out.As a Linux user I'm telling you do not use cheating tools ( for numerous reasons
(Note: as a Linux user I don't seem to have the option to use the cheating tool)
) if you are dead set on cheating use your save files and an online editor... But be warned ! This will sooner or later bite you in the ass ! And a note : do not use the catdude hacked saves... it's just the same as using the cheating tool and it will wreck your game fo sho ! 
https://f95zone.to/threads/81676/
Don't know if it is the easiest way, but I went through oCATo's visual guides to find locations that didn't seem familiar. I had to revisit a number of them to make sure.
Thanks Dragon - I've looked at a number of walkthroughs and haven't spotted it any yet - just persevere I suppose - like waiting for Bruce
Each time I finish an update, I head to the beach for a few more attempts...until I get bored.
use Make Money ->Each time I finish an update, I head to the beach for a few more attempts...until I get bored.
you have to overwrite an old, internal file with the new, external one.
WALKTHROUGH->
Motivation for group scene just too redic -MC can't get it up, MC can't get it down, drugged girls with orgasm virus need group sex with MC to cure etc - dumb as dumb can be and laziest of lazy storytelling for next to no thought put in to set up explain scene. Sad to see a formerly great game which begin with loud roar now end with generic grunt and whimper. So good in beginning. Even if TGO decline similar maybe beautiful and fascinate for long while before go downhill and nosedive. Reprise for good girl Diana, naughty girl Tasha, bad girl Madalyn maybe make worthwhile for a while (crossover of actor happen before Madalyn Pricia as supporting character in ToN and Val Katherine as guest) or some maybe new character interest; am hope TGO MC man with good heart and brain rather than nasty stupid ignoble little shit with prematurely ejaculating giant cock. Am afraid year after year spent mining same tropes over and over NLT Media exhaust novelty combination permutation variation of themes to explore and doomed now to be caught in repetitious stale future bereft of originality which a pity for graphic art most times uncommonly outstanding. Treasure of Nadia begin like gourmet haute cuisine for bon viveur and end like lukewarm McDonald happy meal for adolescent child. 
You probably skip some previous update. Best way to fix it is download last full version.
