Describe the bug
I am using light-theme.auto.conf and dark-theme.auto.conf on macOS 26.0.1, and have noticed that theme.auto.conf themes are not applying macos_titlebar_color. The default "system" option seems to be used.
To Reproduce
Steps to reproduce the behavior:
- Populate light-theme.auto.conf and dark-theme.auto.conf to use a custom macos_titlebar_color (e.g. #000000, #FFFFFF)
- Switch macOS Dark Mode
- Observe the title bar not changing colors.
Screenshots


Environment details
kitty 0.43.1 (7f24dd68c9) created by Kovid Goyal
Darwin Mac 25.0.0 Darwin Kernel Version 25.0.0: Wed Sep 17 21:41:50 PDT 2025; root:xnu-12377.1.9~141/RELEASE_ARM64_T6030 arm64
ProductName: macOS ProductVersion: 26.0.1 BuildVersion: 25A362
OpenGL: '4.1 Metal - 90.5' Detected version: 4.1
Frozen: True
Fonts:
medium: SFMono-Light: /Library/Fonts/SFMono.ttc
Features: ()
bold: SFMono-Medium: /Library/Fonts/SFMono.ttc
Features: ()
italic: SFMono-LightItalic: /Library/Fonts/SFMono.ttc
Features: ()
bi: SFMono-MediumItalic: /Library/Fonts/SFMono.ttc
Features: ()
Paths:
kitty: /Applications/kitty.app/Contents/MacOS/kitty
base dir: /Applications/kitty.app/Contents/Resources/kitty
extensions dir: /Applications/kitty.app/Contents/Resources/Python/lib/kitty-extensions
system shell: /bin/zsh
System color scheme: dark. Applied color theme type: dark
Loaded config files:
/Users/ecanessa/.config/kitty/kitty.conf
Config options different from defaults:
active_tab_font_style (True, False)
bold_font SF Mono Medium
bold_italic_font SF Mono Medium Italic
confirm_os_window_close (0, False)
cursor_blink_interval (0.0, kitty.options.utils.EasingFunction(), kitty.options.utils.EasingFunction())
enable_audio_bell False
font_family SF Mono Light
font_size 14.0
initial_window_height (768, 'px')
initial_window_width (1024, 'px')
italic_font SF Mono Light Italic
kitty_mod ctrl+opt
macos_colorspace default
macos_option_as_alt 3
macos_show_window_title_in none
paste_actions frozenset({'confirm-if-large', 'quote-urls-at-prompt'})
remember_window_size False
repaint_delay 8
scrollback_lines 200000
strip_trailing_spaces smart
tab_bar_style separator
tab_separator
tab_title_template {title}
Removed shortcuts:
kitty_mod+opt+t → set_tab_title
Changed shortcuts:
cmd+k → clear_terminal_and_scrollback
cmd+l → clear_last_command
ctrl+cmd+, → reload_config
ctrl+cmd+l → clear_screen
kitty_mod+t → set_tab_title
opt+cmd+k → clear_scrollback
opt+cmd+r → reset_terminal
shift+cmd+/ → open_kitty_website
Colors:
active_tab_background #002b36
active_tab_foreground #fdf6e3
background #002b36
color0 #eee8d5
color1 #dc322f
color10 #93a1a1
color11 #839496
color12 #657b83
color13 #6c71c4
color14 #586e75
color15 #002b36
color2 #859900
color3 #b58900
color4 #268bd2
color5 #d33682
color6 #2aa198
color7 #073642
color8 #fdf6e3
color9 #cb4b16
cursor #839496
cursor_text_color #002b36
foreground #839496
inactive_tab_background #6c71c4
inactive_tab_foreground #eee8d5
selection_background #586e75
selection_foreground #002b36
tab_bar_background #6c71c4
tab_bar_margin_color #6c71c4
url_color #268bd2
Important environment variables seen by the kitty process:
PATH /Applications/kitty.app/Contents/MacOS:/usr/bin:/bin:/usr/sbin:/sbin
LANG en_US.UTF-8
SHELL /bin/zsh
DISPLAY /private/tmp/com.apple.launchd.oqjpld5cRu/org.xquartz:0
USER ecanessa
Describe the bug
I am using light-theme.auto.conf and dark-theme.auto.conf on macOS 26.0.1, and have noticed that theme.auto.conf themes are not applying macos_titlebar_color. The default "system" option seems to be used.
To Reproduce
Steps to reproduce the behavior:
Screenshots


Environment details