I have a MacBook Pro Late 2011 and the version of MacOS 10.7.2 Lion and I've always been using it no problem, so I didn't update to any of the newer versions of Yosemite, Mavericks, etc. On this Mac, I dual booted (a long time ago... in 2013, I believe) by installing Ubuntu 12.04 using rEFIt as was suggested by the guide (Mactel Dual Boot Guide) I used when dual booting. When I booted up, it would show the rEFIt screen with the choice of booting into Mac or Ubuntu. (I earlier posted this question in the Apple Stack Exchange and they told me it'd be better to post it here at askUbuntu.)
계속하기 전에 rEFIt이 더 이상 사용되지 않고 더 이상 유지되지 않으며 rEFInd가 더 최신 옵션이라는 것을 알고 있습니다. 내가 rEFIt을 사용하는 이유는 (a) 가이드가 제안한 것이고 (b) rEFInd가 나오기 전에 듀얼 부팅을 한 것 같기 때문입니다.
이제 MacOS X El Capitan으로 업데이트했는데 rEFIt 화면이 표시되지 않고 컴퓨터가 Mac으로 부팅됩니다. rEFIt / rEFInd 화면이 다시 나타나서 부팅 할 OS를 선택할 수 있기를 원합니다.
I've searched on Google, and found some relevant links: very similar issue to mine with Yosemite and something which seems to resemble my problems and a very insightful post and here. However, I'm not sure what to do, especially because I don't want to have to re-install Linux as suggested by the third link.
So, my questions are:
다른 사람이이 문제에 직면했거나 통찰력이 있다면 대단히 감사하겠습니다! 감사!
참고 : 저는 rEFInd를 유지합니다.
다운로드 페이지.zip 에서 rEFInd 파일을 다운로드 하여 설치하십시오. rEFInd 문서에 설명 된 대로 극복 할 수있는 SIP (System Integrity Protection)와 관련된 문제가 발생하는 것이 거의 확실합니다 . rEFInd를 설치하면 다시 부팅됩니다. rEFInd에서 rEFIt 항목을 볼 수 있으며 이는 중복으로 렌더링됩니다. /EFI/refitOS X 에서 디렉토리를 삭제하여 제거 할 수 있습니다 . 또는 원하는 경우 제자리에 둘 수 있습니다.
Upgrading your OS X version has updated the OS X boot loader, which has taken control of the boot process from rEFIt. The new SIP feature makes it impossible for the rEFIt support tool called rEFItBlesser to do its job, so even if rEFItBlesser is installed, it can't switch the boot back to one that uses rEFIt. In principle, you could disable SIP and then run rEFItBlesser or re-install rEFIt to get things working again; however, there might be other changes made by installing OS X 10.11 that would create further complications. Overall, therefore, it's probably better to switch to rEFInd -- although rEFIt can be made to work, it's becoming necessary to jump through more and more undocumented hoops to do so.
Chances are your Ubuntu installation is just fine, although I can't be 100% certain of that from the information you've provided. Partition table information would be helpful in making that determination; but as I suspect it's all fine, and as installing rEFInd shouldn't create any real problems even if it's not, you might as well go ahead with a rEFInd installation. There's certainly no call to completely re-install Ubuntu unless you have reason to think that the OS X upgrade has damaged the Ubuntu installation.
Note that rEFInd can launch Linux kernels directly, provided it can read them. Once you install rEFInd, you may see two or more ways to launch Ubuntu. One is likely to show up as a generic penguin icon and will launch a BIOS-mode version of GRUB. This option might or might not still work. Another is likely to show up with an Ubuntu icon and have a description that references a file with a name beginning with vmlinuz. This option boots Ubuntu directly via the kernel in EFI mode, and is the preferred way to launch Ubuntu. If this option works, you can eliminate the BIOS-mode option by editing the refind.conf file: Uncomment the scanfor line and ensure that hdbios is not among the listed options.
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