I have partially worked through this problem, on my 11 inch Macbook Air , mid 2011
http://www.rodsbooks.com/refind/yosemite.html provides the general information.
Installation of the tools were necessary for the work through:
http://www.rodsbooks.com/gdisk/
http://gedit.en.softonic.com/mac
Note that the Yosemite installs adds an additional Recovery Partition , even though it is NOT displayed by the MAC "Disk Utility".
Holding down the "Option" key during a bootup, does display both Recovery Partitions.
Under MAC Maverick, my Linux/Ubuntu partition was also thus displayed as "Windows" and could be used to choose a Ubuntu boot.
But for reasons unclear, this boot choice was not displayed after the Yosemite upgrade.
However the Ubuntu partition is OK, as further related below.
Some of my particular problems may be due to the upgrade "abuse" the partitions have suffered over the years.
At this stage run the he Mac "Partition Inspection" to understand your disk.
My GPT partition table is currently:
Current GPT partition table:
# Start LBA End LBA Type
1 40 409639 EFI System (FAT)
2 409640 154061023 Mac OS X HFS+
3 154061024 155330559 Mac OS X Boot
4 155330560 156598271 Mac OS X HFS+
5 157869786 228772129 Unknown
6 228772130 236974814 Linux Swap
Previously there were two parititons like 3), with only one having the detail "Mac OS X Boot ":
Partition at LBA 154061024:
The older Recovery Partition lacking this spec was deleted using:
$ sudo gdisk /dev/disk0
and menus therein CAREFULLY. You may be able to find space elsewhere if you want to avoid such deleting.
But after the delete, I used the "Disk Utility" to create a new HFS+ partition, for coming installation for REFIND
Then I followed the yosemite.html
option of installing ReFind to its own hfs+ partition:
Within my Dowloads folder there was unzipped folder:
refind-bin-0.8.3/
within which I ran:
$ sudo ./install.sh --ownhfs /dev/disk04
4) now has the ReFind installation.
Following Yosemite.html an edit was necessary.
$ sudo /Applications/gedit.app/Contents/MacOS/gedit /Volumes/EFI/System/Library/CoreServices/refind.conf
Simply clicking on gedit was not sufficient since Root/Adm permission was necessary to edit the refind.conf.
The mandatory change is:
dont_scan_volumes "Recovery HD"
TO:
dont_scan_volumes foo,bar
Save and reboot.
Upon display of the REFIND menu, use the last-bottom Partition Inspector choice to rebuild the hybrid MBR
For some Systems, these changes may suffice for the setup of alternate MAC and Linux boot.
For my MacBook, the MAC boot option did not initially display, but it was displayed after hitting ESC to do a refresh scan
Later it sufficed to set a 1 second delay in the above refind.conf file, to seamlessly bring up the MAC boot option.
For reasons still obscure, the simple choice I had under Maverick for choosing MAC or Linux was not retained,
though your System may be OK at this point
However confirming the integrity of 5) Ubuntu was achieved using the first Refind menu choice to bring up powerful GRUB: http://www.gnu.org/software/grub/manual/grub.html
> ls
displayed the several partitions.
> ls (hd0,gpt5)/
confirmed my linux file system therein.
The regular Ubuntu bootup choices were then acquired with:
> configfile (hd0,gpt5)/boot/grub/grub.cfg
Sadly I have not yet worked out a simpler Ubuntu boot yet. For some of you, it may suffice to simple hold the "option" key down upon reboot,
and your Linux partition may be displayed. Hopefully, I'll later have a more cheering report.
MarvS
