avoid global find clipboard on macos for large files.

src/vs/editor/contrib/find/findController.ts

@@ -345,14 +345,20 @@ export class CommonFindController extends Disposable implements editorCommon.IEd
 	}
 
 	public getGlobalBufferTerm(): string {
-		if (this._editor.getConfiguration().contribInfo.find.globalFindClipboard && this._clipboardService) {
+		if (this._editor.getConfiguration().contribInfo.find.globalFindClipboard
+			&& this._clipboardService
+			&& !this._editor.getModel().isTooLargeForHavingARichMode()
+		) {
 			return this._clipboardService.readFindText();
 		}
 		return '';
 	}
 
 	public setGlobalBufferTerm(text: string) {
-		if (this._editor.getConfiguration().contribInfo.find.globalFindClipboard && this._clipboardService) {
+		if (this._editor.getConfiguration().contribInfo.find.globalFindClipboard
+			&& this._clipboardService
+			&& !this._editor.getModel().isTooLargeForHavingARichMode()
+		) {
 			this._clipboardService.writeFindText(text);
 		}
 	}