diff --git a/CHANGELOG.md b/CHANGELOG.md
index d01e67d2..16fe906a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ Changelog
 
 Release: dd.mm.yyyy
 
+### Bug Fixes
+
+- Fix `Space#moveWindows` on Sonoma 14.5 ([#348](https://github.com/kasper/phoenix/issues/348), [#349](https://github.com/kasper/phoenix/issues/349)).
+
 4.0.0
 -----
 
diff --git a/Phoenix/NSProcessInfo+PHExtension.h b/Phoenix/NSProcessInfo+PHExtension.h
index cf41bbbe..c642e148 100644
--- a/Phoenix/NSProcessInfo+PHExtension.h
+++ b/Phoenix/NSProcessInfo+PHExtension.h
@@ -10,5 +10,6 @@
 
 + (BOOL)isOperatingSystemAtLeastBigSur;
 + (BOOL)isOperatingSystemAtLeastMonterey;
++ (BOOL)canMoveWindowsToManagedSpace;
 
 @end
diff --git a/Phoenix/NSProcessInfo+PHExtension.m b/Phoenix/NSProcessInfo+PHExtension.m
index 88b76f21..3cc9b423 100644
--- a/Phoenix/NSProcessInfo+PHExtension.m
+++ b/Phoenix/NSProcessInfo+PHExtension.m
@@ -18,4 +18,9 @@ + (BOOL)isOperatingSystemAtLeastMonterey {
     return [[self processInfo] isOperatingSystemAtLeastVersion:monterey];
 }
 
++ (BOOL)canMoveWindowsToManagedSpace {
+    NSOperatingSystemVersion sonoma145 = {.majorVersion = 14, .minorVersion = 5, .patchVersion = 0};
+    return ![[self processInfo] isOperatingSystemAtLeastVersion:sonoma145];
+}
+
 @end
diff --git a/Phoenix/PHSpace.m b/Phoenix/PHSpace.m
index 650ca415..bb387c83 100644
--- a/Phoenix/PHSpace.m
+++ b/Phoenix/PHSpace.m
@@ -14,6 +14,7 @@
 
 typedef NSUInteger CGSConnectionID;
 typedef NSUInteger CGSSpaceID;
+typedef NSUInteger CGSWorkspaceID;
 
 typedef enum {
     kCGSSpaceIncludesCurrent = 1 << 0,
@@ -36,6 +37,9 @@ @implementation PHSpace
 static NSString *const CGSSpaceIDKey = @"ManagedSpaceID";
 static NSString *const CGSSpacesKey = @"Spaces";
 
+// An arbitrary ID we can use CGSMoveWindowsToManagedSpace with.
+const NSUInteger MoveWindowsCompatId = 0x79616265;
+
 // XXX: Undocumented private API to get the CGSConnectionID for the default connection for this process
 CGSConnectionID CGSMainConnectionID(void);
 
@@ -61,8 +65,25 @@ @implementation PHSpace
 void CGSRemoveWindowsFromSpaces(CGSConnectionID connection, CFArrayRef windowIds, CFArrayRef spaceIds);
 
 // XXX: Undocumented private API to move the given windows (CGWindowIDs) to the given space
+//      Only works prior to MacOS 14.5!
 void CGSMoveWindowsToManagedSpace(CGSConnectionID connection, CFArrayRef windowIds, CGSSpaceID spaceId);
 
+/**
+ * The two functions below serve as a workaround to CGSMoveWindowsToManagedSpace breaking in MacOS 14.5.
+ * - https://github.com/kasper/phoenix/issues/348
+ * - https://github.com/koekeishiya/yabai/issues/2240#issuecomment-2116326165
+ * - https://github.com/ianyh/Amethyst/issues/1643#issuecomment-2132519682
+ */
+
+// XXX: Undocumented private API to set a space's (legacy) compatID
+CGError CGSSpaceSetCompatID(CGSConnectionID connection, CGSSpaceID spaceId, NSUInteger compatID);
+
+// XXX: Undocumented private API to move the given windows (CGWindowIDs) to the given space by (legacy) compatID
+CGError CGSSetWindowListWorkspace(CGSConnectionID connection,
+                                  CGWindowID *windowIds,
+                                  NSUInteger windowCount,
+                                  NSUInteger compatID);
+
 #pragma mark - Initialising
 
 - (instancetype)initWithIdentifier:(NSUInteger)identifier {
@@ -223,8 +244,23 @@ - (void)removeWindows:(NSArray<PHWindow *> *)windows {
 }
 
 - (void)moveWindows:(NSArray<PHWindow *> *)windows {
-    CGSMoveWindowsToManagedSpace(
-        CGSMainConnectionID(), (__bridge CFArrayRef)[self identifiersForWindows:windows], self.identifier);
+    CGSConnectionID cid = CGSMainConnectionID();
+    if ([NSProcessInfo canMoveWindowsToManagedSpace]) {
+        CGSMoveWindowsToManagedSpace(cid, (__bridge CFArrayRef)[self identifiersForWindows:windows], self.identifier);
+        return;
+    }
+
+    NSArray<NSNumber *> *ids = [self identifiersForWindows:windows];
+    NSUInteger numIds = [ids count];
+    NSMutableData *contiguousIds = [[NSMutableData alloc] initWithCapacity:numIds * sizeof(CGWindowID)];
+    for (id item in ids) {
+        CGWindowID value = [item unsignedIntValue];
+        [contiguousIds appendBytes:&value length:sizeof(CGWindowID)];
+    }
+
+    CGSSpaceSetCompatID(cid, self.identifier, MoveWindowsCompatId);
+    CGSSetWindowListWorkspace(cid, (CGWindowID *)[contiguousIds bytes], numIds, MoveWindowsCompatId);
+    CGSSpaceSetCompatID(cid, self.identifier, 0x0);
 }
 
 @end