Tried to upgrade to OSX Yosemite on my Mac Mini bought this year running OSX Mavericks. It failed. When I checked for issues using Disk Utility I saw:
Disk Utility stopped repairing "Macintosh HD" Disk Utility can't repair this disk. Backup as many of your files as possible, reformat the disk and restore your backed-up files
This was due to the error
unable to bootstrap transaction group 259092 invalid field value
So I erased all and tried an internet recovery with recovery partition. I made my wifi connection open to all, but I still get
OSX cannot be reinstalled because you are not connected to the internet. If you connect to the internet via Wifi use the menu with the wifi icon to select the network. Otherwise plug in an ethernet cable.
I could plug into my wireless router I guess, but as I do not have a mobile screen for my Mac Mini I cannot see what I am doing.
Why does OSX not just connect to the wireless network as it is open? Any way to make it work? Is there an option to start with the basic OSX Recovery Package and activate wifi and then start the upgrade to the full package?