I don't want to use TimeMachineEditor as I would rather use a native app (Time Machine) to achieve the same outcome. I'm following this tutorial to modify a .plist file, which apparently modifies the backup interval. I have opened the com.apple.backupd-auto.plist, although there seems to be 2 things with the standard value of 3600 seconds: Code: <dict> <key>Interval</key> <integer>3600</integer> <key>Delay</key> <integer>3600</integer> <key>GracePeriod</key> <integer>1800</integer> <key>Repeating</key> <true/> <key>AllowBattery</key> <true/> <key>PowerNap</key> <true/> <key>Priority</key> <string>Utility</string> </dict> I'm not sure weather to edit both values or just the first one "Interval", as both "Interval" and "Delay" imply the same thing. Can anybody offer some advice please? Thanks in advance.