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

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