Marine Aquarium for Mac

I am using a nearly new 7,1 Apple Mac Pro (2019) with OS Catalina 10.15.4 or 10.15.3 and I have zero issues with this Mac version 3.2 as long as I leave it on "Light" and not "Dark". Since I cannot stand the "Dark" mode anyway I am thusly perfectly happy with it !

I can't get Marine Aquarium to show up in my list of screensavers. I have a MacBook Pro with Catalina.

This version 3.3b1 works well on my i Mac with high sierra 10.13.6. No problems. Soon I will try it on 10.14.2 (Mojave) on my MBP. I hope it works there too. Still the possibilty to exit full screen on mousemove is always on and couldn't be disabled. But it's no big thing and doesn't disturb me much. Thank you for the update.

Version 3.2.1 works reasonably well on my 27" iMac running macOS 10.12.6. For some reason, though, the screensaver will accepts but won't hold my serial number. The registration field is blank every time I reopen the settings and they won't close unless I paste in the serial number again.. Another interesting issue: The screen saver is limited to seven different kinds of fish—though I can show more fish if I want to. But they will be duplicates of one or another of the fish in the base set. The application, on the other hand, gives me access to all the fish and I can show up to twenty-two of them at a time—even though the limit is still set at eight. And, finally, the app holds my registration. I suspect those having trouble with Marine Aquarium may be using a Mac laptop with dual video RAM. The computer will use a portion of the system RAM in order to conserve battery life. In order to get better performance you need to be sure you are using the more powerful video card. I don't recall, unfortunately, how you switch between the two, or insure one or the other is used for a specific application. Sadly the product web site was deactivated last month. So I cannot comment there about it. I saw no recent comments there in any case. Though I didn't check all the blogs. Sadly it seems to be the case that development ceased in 2014. Even so, it still works, with a quirk of two. So despite the lapse in development, I don't regret the money I spent on the original and the upgrade.. I don't know if it works in High Sierra because I haven't upgraded from Sierra yet. Perhaps someone who has upgraded can speak to that question.

It's really dumb of the developer to post "OS X 10.4 or later" when they're not going to maintain it for compatibility with future OS's. Should probably say "OS X 10.4 to 10.10," because it worked through Mavericks.

But since buying a new computer with El Capitan, it's very quirky.
It runs, but the fish are bizarre - some are only partially visible and swim through the coral and other objects. Some will be partially visible and then suddenly POP into full visibility. And sometimes some fish only appear as wire frameworks without skin or color.

I contacted the dev. twice about this and never received a response.
Since it no longer works on my OS and has been abandoned by the developer, I'm giving it the lowest possible rating.

Still a cool app for older OS's, but if you have a problem you're on your own - don't expect help from the developer!