diff --git a/src/textual/_xterm_parser.py b/src/textual/_xterm_parser.py
index 0391cfcded..ddb935f505 100644
--- a/src/textual/_xterm_parser.py
+++ b/src/textual/_xterm_parser.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import os
 import re
 from typing import Any, Generator, Iterable
 
@@ -42,6 +43,9 @@
 )
 
 
+IS_ITERM = os.environ.get("TERM_PROGRAM", "") == "iTerm.app"
+
+
 class XTermParser(Parser[Message]):
     _re_sgr_mouse = re.compile(r"\x1b\[<(\d+);(\d+);(\d+)([Mm])")
 
@@ -262,7 +266,8 @@ def send_escape() -> None:
                         setting_parameter = int(mode_report_match["setting_parameter"])
                         if mode_id == "2026" and setting_parameter > 0:
                             on_token(messages.TerminalSupportsSynchronizedOutput())
-                        elif mode_id == "2048":
+                        elif mode_id == "2048" and not IS_ITERM:
+                            # TODO: remove "and not IS_ITERM" when https://gitlab.com/gnachman/iterm2/-/issues/11961 is fixed
                             in_band_event = messages.TerminalSupportInBandWindowResize.from_setting_parameter(
                                 setting_parameter
                             )