diff --git a/README.md b/README.md
index 3677f5a3..058c9819 100644
--- a/README.md
+++ b/README.md
@@ -18,14 +18,12 @@ flowchart LR
     "]
     win["os_win.bash"]
     ubu["os_ub.bash"]
-    mac["os_mac.bash"]
     bashrc --> |"load"| init
     init --> |"load"| anyos
     anyos --> |"load if type program"| program-dependent
     win --> |"bash alias to each function at"| oswinps1
     init --> |"load if $OSTYPE==msys* || -n $WSL_DISTRO_NAME"| win
     init --> |"load if $OSTYPE==linux*"| ubu
-    init --> |"load if $OSTYPE==mac*"| mac
 ```
 
 ## Install
@@ -69,13 +67,6 @@ Ubuntu helpers are defined in [os_ubu.bash](os_ubu.bash). See some below.
 - `gnome_dark_mode`: enable gnome dark mode.
 - `gnome_nautilus_list_view`: enable nautilus list view.
 
-### os_mac
-
-Mac helpers are defined in [os_mac.bash](os_mac.bash). See some below.
-
-- `mac_update`: update os and brew.
-- `mac_install_brew`: install brew package manager
-
 ### os_win
 
 Win helpers are defined in [os_win.bash](os_win.bash) and [os_win.ps1](os_win.ps1), see some below.
diff --git a/init.sh b/init.sh
index 7675dbaa..1780ed2a 100644
--- a/init.sh
+++ b/init.sh
@@ -16,10 +16,6 @@ if [[ $OSTYPE == linux* ]]; then
     source "$BH_DIR/os_ubu.bash"
 fi
 
-if [[ $OSTYPE == darwin* ]]; then
-    source "$BH_DIR/os_mac.bash"
-fi
-
 # load <program>.bash files
 
 for file in "$BH_DIR/programs/"*.bash; do
diff --git a/os_mac.bash b/os_mac.bash
deleted file mode 100644
index fdc68c10..00000000
--- a/os_mac.bash
+++ /dev/null
@@ -1,11 +0,0 @@
-function mac_install_brew() {
-    /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
-}
-
-function mac_update() {
-    log_msg "brew upgrade all"
-    brew update
-    sudo brew upgrade
-    log_msg "mac os upgrade"
-    sudo softwareupdate -i -a
-}