a collection of
free screen savers
for X11 and MacOS
by Jamie Zawinski
and many others.
If any part of the XScreenSaver collection appears to have a bug,
I need as much information as possible about what went wrong.
Please describe the problem in as much detail as you can.
I'll also need to know:
MacOS and iOS users:
- Which screen saver is it?
- What is the XScreenSaver version number?
- What is the MacOS or iOS version number,
and/or iPhone/iPad model?
- Have you tried the latest version
of XScreenSaver to see if your bug is already fixed?
If using MacOS, please do the following:
- Open Terminal.app;
- Type this:
egrep 'Saver|Pref' /var/log/system.log
- Mail me everything that was printed.
- If the "Library/Logs/CrashReporter" folder
(under your home directory)
contains files for "ScreenSaverEngine" or
"System Preferences", include those as well.
If a particular option setting is making one of the screen
savers crash, you can reset the options to the default state by
deleting the corresponding file in
"Library/Preferences/ByHost/". The file name will begin
And finally, email your bug report to
Please try to give it a descriptive subject line!
A good subject would be something like
"dangerball stops spinning".
A bad subject would be "xscreensaver bug".