How to Launch Safari in Private Mode by Default
Apple’s default browser Safari is known for its simplicity of usage. In the same vein, it’s super easy to apply settings in Safari that allows you to open a new window in private mode by default.
The best part is that it is literally two-step process and does not require you to create a script like the other browsers. Here’s what you need to do.
Launch Safari and then go to "Settings". You can use the Command + , keyboard shortcut, or find it in Safari > Settings.
Make sure you are in "General Tab", then look under “Safari opens with:” and select “A new private windows” from the dropdown.
From now on, whenever you launch Safari, it should open the browser in Private Mode by default.