MacOS

Allow opening apps from unidentified developers

sudo spctl --master-disable

To undo this action run:

sudo spctl --master-enable

Microsoft Office 2019

https://mac-torrent-download.net/microsoft-office-2019-for-mac-16-28/

MathType

https://mac-torrent-download.net/mathtype-7-4-2/

Fix Wi-Fi problems

http://osxdaily.com/2016/09/22/fix-wi-fi-problems-macos-sierra/
https://appleinsider.ru/mac-os-x/kak-reshit-problemy-s-wi-fi-na-mac.html

Clearing the icon cache

The command to remove the main store is

sudo rm -rfv /Library/Caches/com.apple.iconservices.store

That for the subsidiary data is

sudo find /private/var/folders/ \( -name com.apple.dock.iconcache -or -name com.apple.iconservices \) -exec rm -rfv {} \;

which includes the Dock icon cache too.

Once you have done that, you’ll need to restart and give your Mac plenty of time to rebuild the caches.

Source: https://mjtsai.com/blog/2019/02/01/clearing-the-icon-services-cache-in-mojave/

Kill process at port

Source: https://stackoverflow.com/a/15281020

lsof -i :3000 (where 3000 is your current port in use)
ps ax | grep <PID>
kill -QUIT <PID>

Denis Voloshin