Lost Mac OS after reinstall

[tutututu2]

Hi,

I used to run a Kubuntu 12.10 on my Macbook Pro (version 6), using a dual boot with Mac OS.

I made a fresh install (Kubuntu 14.04 LTS) by erasing the former system (but neither my /home nor the Mac OS files).
(As usual, I followed the MactelSupportTeam/AppleIntelInstallation (https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation#Detailed_How-To) instructions.)

The installing process went fine, except that refit disappeared. I did install grub on my root Ubuntu partition (something like /dev/sda3).
So my Macbook is now booting directly to grub, from which I have 3 options:
- run Linux, which runs fine
- run MacOS 64, which leads to an error
- run MacOS 32, which does boot the system, but incredibly slow

What can I do to recover refit and hence MacOS?

Thanks!

[tutututu2]

No idea…? :(

[yancek]

You might try downloading and running the boot repair script and just getting the output and posting that info here. Someone with familiarity with a Mac might be able to help.

https://help.ubuntu.com/community/Boot-Repair