@Gta, This is the link to the current Kobo Glo firmware.
https://kbdownload1-a.akamaihd.net/f...4.26.16704.zip
When you connect your Kobo to your computer, you extract the contents of kobo-update-4.26.16704.zip to the .kobo directory. Given that you are using OX, you have to set OSX to show directories that start with a period. Then you eject and wait. The Kobo will install and reboot the firmware that you pit in the .kobo directory.
That's all there is to it.