When setting SUScheduledCheckInterval = 3600 from info.plist, SPUUpdaterDelegate will report through delegate method willScheduleUpdateCheckAfterDelay that the interval is 604800.0, which does not == 3600 (1 hour)
Possible Fix
Respect plist setting of SUScheduledCheckInterval for any value >= 3600 (where 3600 equals the minimum delay of 1 hour)
Summary
When setting SUScheduledCheckInterval = 3600 from info.plist, SPUUpdaterDelegate will report through delegate method willScheduleUpdateCheckAfterDelay that the interval is 604800.0, which does not == 3600 (1 hour)
Possible Fix
Respect plist setting of SUScheduledCheckInterval for any value >= 3600 (where 3600 equals the minimum delay of 1 hour)
Version
Sparkle 2.5.2 - installed through SPM