[CentOS] Finally.... CentOS on iMac core 2

[Philip Manuel]

----- Original Message -----
From: "Wes James" <comptekki at gmail.com>
To: "CentOS mailing list" <centos at centos.org>
Sent: Saturday, 23 November, 2013 12:03:15 PM
Subject: [CentOS] Finally.... CentOS on iMac core 2

I've been trying several combinations of OSX, CentOS to try and get CentOS
installed on an old iMac. I finally first installed OS X, then installed
CentOS in the open space after OS X. With refit installed and selecting
CentOS, it starts booting but get a screen that a boot device can't e
found. So I then install Xubuntu with the option to replace OS X.  After
Xbuntu is installed and then do a reboot the grub screen comes up and I can
now select CentOS and it will boot.

Can someone explain why this is?  I can't just install CentOS on the whole
disk, as I get the blinking mac disk with question mark.

Thanks,

-wes
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this is due I believe due to the partitioning scheme of the iMac, using GPT, and as grub does not support GPT partitions. you have to use grub2. Hence, why xubuntu works.