Based on a reversion of upstream 7e3e20d89129614f4a7b2451fe321cc6ccca3b76,
adapted for 7.2.0

diff --git a/include/ui/clipboard.h b/include/ui/clipboard.h
index ce76aa451f..c4e1dc4ff4 100644
--- a/include/ui/clipboard.h
+++ b/include/ui/clipboard.h
@@ -269,7 +269,7 @@ void qemu_clipboard_set_data(QemuClipboardPeer *peer,
                              QemuClipboardInfo *info,
                              QemuClipboardType type,
                              uint32_t size,
-                             const void *data,
+                             void *data,
                              bool update);
 
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(QemuClipboardInfo, qemu_clipboard_info_unref)
diff --git a/ui/clipboard.c b/ui/clipboard.c
index 3d14bffaf8..2c3f4c3ba0 100644
--- a/ui/clipboard.c
+++ b/ui/clipboard.c
@@ -154,7 +154,7 @@ void qemu_clipboard_set_data(QemuClipboardPeer *peer,
                              QemuClipboardInfo *info,
                              QemuClipboardType type,
                              uint32_t size,
-                             const void *data,
+                             void *data,
                              bool update)
 {
     if (!info ||
diff --git a/ui/cocoa.m b/ui/cocoa.m
index 660d3e0935..0e6760c360 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -29,7 +29,6 @@
 
 #include "qemu/help-texts.h"
 #include "qemu-main.h"
-#include "ui/clipboard.h"
 #include "ui/console.h"
 #include "ui/input.h"
 #include "ui/kbd-state.h"
@@ -105,10 +104,6 @@ static void cocoa_switch(DisplayChangeListener *dcl,
 
 static bool allow_events;
 
-static NSInteger cbchangecount = -1;
-static QemuClipboardInfo *cbinfo;
-static QemuEvent cbevent;
-
 // Utility functions to run specified code block with iothread lock held
 typedef void (^CodeBlock)(void);
 typedef bool (^BoolCodeBlock)(void);
@@ -1799,107 +1794,6 @@ static void addRemovableDevicesMenuItems(void)
     qapi_free_BlockInfoList(pointerToFree);
 }
 
-@interface QemuCocoaPasteboardTypeOwner : NSObject<NSPasteboardTypeOwner>
-@end
-
-@implementation QemuCocoaPasteboardTypeOwner
-
-- (void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSPasteboardType)type
-{
-    if (type != NSPasteboardTypeString) {
-        return;
-    }
-
-    with_iothread_lock(^{
-        QemuClipboardInfo *info = qemu_clipboard_info_ref(cbinfo);
-        qemu_event_reset(&cbevent);
-        qemu_clipboard_request(info, QEMU_CLIPBOARD_TYPE_TEXT);
-
-        while (info == cbinfo &&
-               info->types[QEMU_CLIPBOARD_TYPE_TEXT].available &&
-               info->types[QEMU_CLIPBOARD_TYPE_TEXT].data == NULL) {
-            qemu_mutex_unlock_iothread();
-            qemu_event_wait(&cbevent);
-            qemu_mutex_lock_iothread();
-        }
-
-        if (info == cbinfo) {
-            NSData *data = [[NSData alloc] initWithBytes:info->types[QEMU_CLIPBOARD_TYPE_TEXT].data
-                                           length:info->types[QEMU_CLIPBOARD_TYPE_TEXT].size];
-            [sender setData:data forType:NSPasteboardTypeString];
-            [data release];
-        }
-
-        qemu_clipboard_info_unref(info);
-    });
-}
-
-@end
-
-static QemuCocoaPasteboardTypeOwner *cbowner;
-
-static void cocoa_clipboard_notify(Notifier *notifier, void *data);
-static void cocoa_clipboard_request(QemuClipboardInfo *info,
-                                    QemuClipboardType type);
-
-static QemuClipboardPeer cbpeer = {
-    .name = "cocoa",
-    .notifier = { .notify = cocoa_clipboard_notify },
-    .request = cocoa_clipboard_request
-};
-
-static void cocoa_clipboard_update_info(QemuClipboardInfo *info)
-{
-    if (info->owner == &cbpeer || info->selection != QEMU_CLIPBOARD_SELECTION_CLIPBOARD) {
-        return;
-    }
-
-    if (info != cbinfo) {
-        NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
-        qemu_clipboard_info_unref(cbinfo);
-        cbinfo = qemu_clipboard_info_ref(info);
-        cbchangecount = [[NSPasteboard generalPasteboard] declareTypes:@[NSPasteboardTypeString] owner:cbowner];
-        [pool release];
-    }
-
-    qemu_event_set(&cbevent);
-}
-
-static void cocoa_clipboard_notify(Notifier *notifier, void *data)
-{
-    QemuClipboardNotify *notify = data;
-
-    switch (notify->type) {
-    case QEMU_CLIPBOARD_UPDATE_INFO:
-        cocoa_clipboard_update_info(notify->info);
-        return;
-    case QEMU_CLIPBOARD_RESET_SERIAL:
-        /* ignore */
-        return;
-    }
-}
-
-static void cocoa_clipboard_request(QemuClipboardInfo *info,
-                                    QemuClipboardType type)
-{
-    NSAutoreleasePool *pool;
-    NSData *text;
-
-    switch (type) {
-    case QEMU_CLIPBOARD_TYPE_TEXT:
-        pool = [[NSAutoreleasePool alloc] init];
-        text = [[NSPasteboard generalPasteboard] dataForType:NSPasteboardTypeString];
-        if (text) {
-            qemu_clipboard_set_data(&cbpeer, info, type,
-                                    [text length], [text bytes], true);
-        }
-        [pool release];
-        break;
-    default:
-        break;
-    }
-}
-
 /*
  * The startup process for the OSX/Cocoa UI is complicated, because
  * OSX insists that the UI runs on the initial main thread, and so we
@@ -1922,7 +1816,6 @@ static void cocoa_clipboard_request(QemuClipboardInfo *info,
     status = qemu_default_main();
     qemu_mutex_unlock_iothread();
     COCOA_DEBUG("Second thread: qemu_default_main() returned, exiting\n");
-    [cbowner release];
     exit(status);
 }
 
@@ -2003,18 +1896,6 @@ static void cocoa_refresh(DisplayChangeListener *dcl)
             [cocoaView setAbsoluteEnabled:YES];
         });
     }
-
-    if (cbchangecount != [[NSPasteboard generalPasteboard] changeCount]) {
-        qemu_clipboard_info_unref(cbinfo);
-        cbinfo = qemu_clipboard_info_new(&cbpeer, QEMU_CLIPBOARD_SELECTION_CLIPBOARD);
-        if ([[NSPasteboard generalPasteboard] availableTypeFromArray:@[NSPasteboardTypeString]]) {
-            cbinfo->types[QEMU_CLIPBOARD_TYPE_TEXT].available = true;
-        }
-        qemu_clipboard_update(cbinfo);
-        cbchangecount = [[NSPasteboard generalPasteboard] changeCount];
-        qemu_event_set(&cbevent);
-    }
-
     [pool release];
 }
 
@@ -2071,12 +1952,6 @@ static void cocoa_display_init(DisplayState *ds, DisplayOptions *opts)
 
     // register vga output callbacks
     register_displaychangelistener(&dcl);
-
-    qemu_event_init(&cbevent, false);
-    cbowner = [[QemuCocoaPasteboardTypeOwner alloc] init];
-    qemu_clipboard_peer_register(&cbpeer);
-
-    [pool release];
 }
 
 static QemuDisplay qemu_display_cocoa = {