For My personal and private miscellanous thoughts i have been writing on a diary, but i always need to have it with me and (im kinda ashamed) i dont write good if i write as fast as on computer. I obviously cant copy/paste and i use a pen. I also find myself better with a keyboard so using a computer is what i think the most efficent way. Now, my daily driver (and what im writing this on) is a MacBookAir 2013 11" with (still) MacOS 10.14.5 installed and to write I’d use LibreOffice (duh). I know thou that this isnt private, its connected to the internet and its still using MacOS. I know a bit about technology (i find it weird for someone with zero knowledge of it having even found lemmy, but who knows), but i am certanly no expert. That’s why i am asking you how could i write on a computer privately. Nothing needs to get online but i will need to atleast have other documents or documents itself come in trough a USB probably. I am certain i need to install a Linux distro or a BSD. Keep in mind that if i need that machine not on the internet id need to have another machine wich is and from this machine would probably need to get stuff out and into the “private one” with a USB. This is probably confusing and if it isnt relative to the sub and needs to be deleted, please warn me with a comment so i can copy and save this post to post it somwhere else before it gets deleted.
I don’t know what tools you would use for this on MacOS, but you could use some firewall implementation to block internet access for user and system apps that your are concerned about. If suspect that unwanted connections are being made to specific hosts (IP addresses or URLs) and you know them, you could block access to those specific hosts with a hosts file or, again, with your firewall.
To summarize the above:
You could also simply disconnect from the internet while typing, then saving and encrypting the saved file, deleting the plain text file and only then reconnecting to the internet.
Lastly, don’t put effort into pursuing privacy blindly. Formulate your threat model. What do you need to protect? What do you want to protect? From whom? Why? Without this, you’ll burn yourself out.