In the back of my mind there is an itch telling me that there is a way to launch SketchUp from a terminal window with a command line argument telling it not to open a file…but for the life of me I can’t remember what it is
This experience leaves me wishing for something like launching the program with the option key or something that would give you some alternate choices like choosing a different file to start with and maybe choosing not to load extensions.
You may have an answer already, but for what it’s worth Mac apps have a convention where if you hold down the shift key while the app is starting, documents that were open when the app was last closed are not reopened.
I almost never open a file directly in Sketchup. I right click on the file in File Explorer and select the Version of Sketchup I want to use.
I also use a template which is set as the default file when starting a new project. You can make the default template: In a new file set everything the way you want including tags, trays open, styles, etc. Once totally set go to File _ Save As _ Default and name it.
You can always reset your defaults and do another save as default.