diff --git a/OSBindings/Mac/Clock Signal/MachinePicker/MachinePicker.swift b/OSBindings/Mac/Clock Signal/MachinePicker/MachinePicker.swift
index 30977db28..2c7b40226 100644
--- a/OSBindings/Mac/Clock Signal/MachinePicker/MachinePicker.swift	
+++ b/OSBindings/Mac/Clock Signal/MachinePicker/MachinePicker.swift	
@@ -51,7 +51,11 @@ class MachinePicker: NSObject {
 
 		// Machine type
 		if let machineIdentifier = standardUserDefaults.string(forKey: "new.machine") {
-			machineSelector?.selectTabViewItem(withIdentifier: machineIdentifier as Any)
+			// If I've changed my mind about visible tabs between versions, there may not be one that corresponds
+			// to the stored identifier. Make sure not to raise an NSRangeException in that scenario.
+			if let index = machineSelector?.indexOfTabViewItem(withIdentifier: machineIdentifier as Any), index != NSNotFound {
+				machineSelector?.selectTabViewItem(at: index)
+			}
 		}
 
 		// Apple II settings