
The Specific Calls check box will use the Alarm notification method selected in the Alarms Popup if a call in the comma delimited list is received on the cluster.
The Speak all DX Cluster spots check box will cause all DX Cluster spots to be spoken.
The DXCC NOT in Log and DXCC NOT Confirmed in Log checkboxes will use the Alarm notification method selected in the Alarms Popup if that dxcc id is received on the cluster. These alarms do not require Auto Lookup to be enabled.
If certain other criteria are met (CQ Zone, State, IOTA) you can choose to have MacLoggerDX alert you with a Beep, voice announcement or an email sent to the address you choose. These alarms require Auto Lookup to be enabled.
The alarms operate on all unfiltered spots received from the cluster so it is possible for an alarm to be triggered for a spot which is visible in the Clusters Panel but which has been filtered out of the Spots Panel.

If Check By Band is checked an alarm will be raised if for example if you have also checked DXCC NOT in Log and a call is spotted which you have in your log but not on the spotted band.
If Check By Mode is checked an alarm will be raised if for example if you have also checked DXCC NOT in Log and a call is spotted which you have in your log but not in the spotted mode.
Both Alarm 1 and Alarm 2 can be set to None, a System Sound, a speech advisory, an email or a Growl notification.
Growl lets Mac OS X applications unintrusively tell you when things happen and can be downloaded here.
The Band Openings Alarm will be raised after 10 spots (popup selectable) are received from the cluster of any DXCC from another reporting DXCC in a 30 minute period (i.e. USA reporting Japan 10 times within 30 minutes). The Band Openings popup sets the threshold number of spots which will raise an alarm.
The To Or From My DXCC check box restricts Band Opening Alarms to those to or from your DXCC Country.
The Same DXCC check box includes Band Opening Alarms for those to and from the same DXCC Country.