diff --git a/Calendarr iOS.xcodeproj/project.pbxproj b/Calendarr iOS.xcodeproj/project.pbxproj
index 0e47383..b2b3269 100644
--- a/Calendarr iOS.xcodeproj/project.pbxproj	
+++ b/Calendarr iOS.xcodeproj/project.pbxproj	
@@ -393,6 +393,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				CURRENT_PROJECT_VERSION = 7;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
@@ -411,10 +412,9 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				CURRENT_PROJECT_VERSION = 7;
-				MARKETING_VERSION = 3.5;
 				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
 				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MARKETING_VERSION = 3.5;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -459,6 +459,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				CURRENT_PROJECT_VERSION = 7;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -471,10 +472,9 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				CURRENT_PROJECT_VERSION = 7;
-				MARKETING_VERSION = 3.5;
 				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
 				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MARKETING_VERSION = 3.5;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = iphoneos;
@@ -515,7 +515,7 @@
 				PRODUCT_NAME = "Calendarr iOS";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
-				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MACCATALYST = YES;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_APPROACHABLE_CONCURRENCY = YES;
@@ -523,7 +523,7 @@
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = 1;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
 		};
@@ -558,7 +558,7 @@
 				PRODUCT_NAME = "Calendarr iOS";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
-				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MACCATALYST = YES;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_APPROACHABLE_CONCURRENCY = YES;
@@ -566,7 +566,7 @@
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = 1;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
 		};
@@ -592,14 +592,14 @@
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
-				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MACCATALYST = YES;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = 1;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
 		};
@@ -625,13 +625,13 @@
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
-				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MACCATALYST = YES;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = 1;
+				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
 		};
diff --git a/CalendarrWidgets/CalendarIntent.swift b/CalendarrWidgets/CalendarIntent.swift
index 6c27d8a..78e9a81 100644
--- a/CalendarrWidgets/CalendarIntent.swift
+++ b/CalendarrWidgets/CalendarIntent.swift
@@ -32,11 +32,16 @@ struct CalendarEntityQuery: EntityQuery {
 }
 
 /// Widget configuration intent: lets the user pick which calendars to show.
-/// An empty selection means "show all calendars" (the default).
+/// No selection means "show all calendars" (the default).
+///
+/// The parameter must be optional: WidgetConfigurationIntent requires every
+/// parameter type to be optional, and the macOS/Mac Catalyst SDK enforces that
+/// where the iOS one lets a bare array through. `nil` and `[]` are treated
+/// alike downstream, so this is behaviour-preserving.
 struct CalendarSelectionIntent: WidgetConfigurationIntent {
     static var title: LocalizedStringResource = "Kalender auswählen"
     static var description = IntentDescription("Wähle welche Kalender im Widget angezeigt werden. Leer = alle Kalender.")
 
     @Parameter(title: "Kalender")
-    var selectedCalendars: [CalendarAppEntity]
+    var selectedCalendars: [CalendarAppEntity]?
 }
diff --git a/CalendarrWidgets/CalendarrTimelineProvider.swift b/CalendarrWidgets/CalendarrTimelineProvider.swift
index fcb6902..d091007 100644
--- a/CalendarrWidgets/CalendarrTimelineProvider.swift
+++ b/CalendarrWidgets/CalendarrTimelineProvider.swift
@@ -38,8 +38,8 @@ struct CalendarrTimelineProvider: AppIntentTimelineProvider {
 
     private func filtered(_ snapshot: WidgetSnapshot?, by config: CalendarSelectionIntent) -> WidgetSnapshot? {
         guard let snapshot else { return nil }
-        let ids = config.selectedCalendars.map { $0.id }
-        guard !ids.isEmpty else { return snapshot }   // empty = show all
+        let ids = (config.selectedCalendars ?? []).map { $0.id }
+        guard !ids.isEmpty else { return snapshot }   // nothing selected = show all
         let keep = Set(ids)
         return WidgetSnapshot(
             writtenAt:          snapshot.writtenAt,