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Ticket UUID: 4a2070f0d3a99aa412bc582d386d575ca2f37323
Title: "wm iconbitmap" hangs on macOS 26 Intel
Type: Bug Version: 8.6.17, 9.0.3
Submitter: hugovk Created on: 2026-04-02 08:03:53
Subsystem: (unused) Assigned To: nobody
Priority: 5 Medium Severity: Minor
Status: Open Last Modified: 2026-04-03 15:26:12
Resolution: None Closed By: nobody
    Closed on:
Description:

"wm iconbitmap" hangs on macOS 26 Tahoe Intel. For example, running this script with wish:

wm iconbitmap . hourglass
puts "OK: wm iconbitmap succeeded"
exit

hangs for at least 60s on macOS 26 Intel for both 8.6.17 and 9.0.3.

It completes in a second or less for macOS 26 Apple Silicon and macOS 14-15 (Intel + Apple Silicon).

Tests:

See also python/cpython#146531.

User Comments: nab added on 2026-04-03 15:26:12:
neither do I, sorry

++

marc_culler (claiming to be Marc Culler) added on 2026-04-03 13:37:49:
Unfortunately none of my Intel macs are able to run Tahoe, so I don't
have any way to debug this.

Can someone else help with this?