[BUG] No context menu in gitk on macos

>
> # What did you do before the bug happened? (Steps to reproduce your issue)
>
> 1. create repo with one commit
> 2. gitk
> 3. right click on commit
>
> # What did you expect to happen? (Expected behavior)
>
> See context menu like on Windows
>
> # What happened instead? (Actual behavior)
>
> Nothing
>
> # What's different between what you expected and what actually happened?
>
>
> # Anything else you want to add:
>
> [System Info]
> git version:
> git version 2.51.0
> cpu: arm64
> no commit associated with this build
> sizeof-long: 8
> sizeof-size_t: 8
> shell-path: /bin/sh
> feature: fsmonitor--daemon
> libcurl: 8.7.1
> zlib: 1.2.12
> SHA-1: SHA1_DC
> SHA-256: SHA256_BLK
> default-ref-format: files
> default-hash: sha1
> uname: Darwin 24.6.0 Darwin Kernel Version 24.6.0: Mon Jul 14 11:28:30
> PDT 2025; root:xnu-11417.140.69~1/RELEASE_ARM64_T6030 arm64
> compiler info: clang: 17.0.0 (clang-1700.0.13.3)
> libc info: no libc information available
> $SHELL (typically, interactive shell): /bin/zsh
>
>
> [Enabled Hooks]

> # What did you do before the bug happened? (Steps to reproduce your issue)
> 
> 1. create repo with one commit
> 2. gitk
> 3. right click on commit
> 
> # What did you expect to happen? (Expected behavior)
> 
> See context menu like on Windows
> 
> # What happened instead? (Actual behavior)
> 
> Nothing