macos
Prior to updating to Mavericks I used LotsaWater screensaver. It would display my desktop while the screensaver did its thing. Now it shows a blank white screen when it kicks over to the screensaver mode.
Under System Prefs>Desktop & Screen saver, the preview window shows how it's supposed to look and if you tap on preview it works right.
Is it that the maker of this screensaver hasn't made it compatible with Mavericks? Or am I missing something?
If you see the old unlock screen (gray window asking for your username and password) you have to delete the following file:
/etc/cacloginconfig.plist
If you delete this file, you will see the new unlock screen (like the login screen) and touch ID will work again.
Summary: If "/etc/cacloginconfig.plist" exists in 10.9 +, the screensaver unlock screen will be controlled by SecurityAgent (old style). Admins, when they successfully authenticate, will be allowed to take over the user's session. Even if "system.login.screensaver" in AuthDB is set to "use-login-window-ui", this will be overridden by the existence of "/etc/cacloginconfig.plist". We will still be presented with the SecurityAgent style login window.
More Info: http://www.openradar.me/19177988
This would be explained if your iMac was sometimes in what Apple calls Safe Sleep and others (and Apple internally) call hibernation mode and is expected and intended by Apple to save energy.
You should be able to disable this if needed by using pmset on the command line. Unless you are comfortable with the terminal, you might just leave things as Apple has configured since the hibernation should only engage for longer sleep periods to save more energy than if the machine was kept sleeping lightly the entire time.
Best Answer
Check the version you got.
v1.7 works like a charm for me under Mavericks.
v1.7 is available here: http://wakaba.c3.cx/s/lotsablankers/lotsawater
Edit: sorry, it doesn't work exactly as I said. Actually, the water animation works, but the screenshot Lotsawater is supposed to do is a black screen instead. I assume the v1.7 is not Mavericks (full) compatible.
Edit 2: Developper fixed it!, v1.8 is now available and works like a charm :)
***Edit 3: 1.8 works like a charm on a single monitor, but the second monitor of a dual monitor setup still has a black screen shot. This wasn't the case with version 1.7 on Mountain Lion. I hope the developer has another update in the works.