my .bash_profile in OS X

My .bash_profile as currently configured on Yosemite (10.10.2). It also still works in Snow Leopard (10.6.8).

PS1='\D{%Y-%m%d-%H%M-%S %z} \w \u\$ '

export HISTFILESIZE=99999

export HISTSIZE=9999

export HISTCONTROL='ignoreboth:erasedups'

export PROMPT_COMMAND='history -n; history -w; history -c; history -r'

# check current working directory first

export PATH="${PATH}::"

# check my local Applications directory

export PATH="${PATH}:${HOME}/Applications"

My .bash_profile as currently configured on High Sierra (10.13).

PS1='\D{%Y-%m%d-%H%M-%S} \h \w \u\$ '

export HISTFILESIZE=99999

export HISTSIZE=9999

export HISTCONTROL='ignoreboth:erasedups'

export PROMPT_COMMAND='history -n; history -w; history -c; history -r'