Latvian locale for Mac OS X
- Open up terminal
- Go to downloaded lv_LV directory
sudo cp -R lv_LV.UTF-8 /usr/share/locale/
System Integrity Protection
Some newer systems like El Capitan (10.11) have this protection model that forbids even a root user to make chahnges in OS file-system directories. This also relates to /usr/share/locale/ directory and you can have "Operation not permitted" errors while copying files.
To overcome this issue, disable System Integrity Protection