If you still cannot retrieve the access to your MikroTik router or RouterOS devices after you tried to reset it to factory default settings, you can reinstall the RouterOS on your router with NetInstall to start everything from fresh. Mikrotik Netinstall For Mac Os High Sierra.MikroTik now provides hardware and software for Internet connectivity in most of. MikroTik is a Latvian company which was founded in 1996 to develop routers and wireless ISP systems. To do this, ensure your Winbox PC (not the router) has a working internet connection without any restrictions to reach and click ‘update license’ in the license menu. Netinstall will ignore old license restriction and will upgrade When upgrading to RouterOS v4 or newer, the system will ask you to update license to a new format.