I have a retina MBP with OS X El Capitan (10.11.6) on a 15" Mid 2014 laptop. I basically, long ago, followed http://davidlively.com/notes/macbook-pro-triple-boot/ and it has been working for a long time.
I think I screwed it up though when I installed fuse-ext2 - I'm not blaming that project, maybe I did something, but at any rate, now when it starts I only get a dimly lit black screen. I have to hold down Option key and the I only get 3 icons: OS X, OS X, and WINDOWS. The middle one "doesn't work" it just sits there. Windows used to work but not it complains of not being able to start. From Mac (the first one), El Capitan works fine and I can see the contents of the Windows partition (it was made with Bootcamp).
Here is some info about my layout of the SSD:
sbhs-MBP:Volumes sbh$ diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: Microsoft Basic Data BOOTCAMP 200.8 GB disk0s2 3: Apple_HFS DATA 272.9 GB disk0s3 4: Apple_HFS OS X 249.5 GB disk0s4 5: Apple_Boot Recovery HD 650.0 MB disk0s5 6: Linux Swap 20.0 GB disk0s6 7: Microsoft Basic Data 215.3 GB disk0s7 8: Linux Filesystem 40.7 GB disk0s8
Btw, #3 is just a shared partition with data on it - no OS; 7 & 8 are linux mint 17.3 and 18; also csrutil is disabled; and if it matters, nothing is journaled.
If I use a live mint stick I can see everything on disk0s7 and disk0s8, and think they are probably okay. It seems to be a booting issue.
Most recently I have re-blessed rEFInd on the EFI partition (/dev/disk0s1) and yet I still get a dimly lit black screen... Currently though I am writing this on the El Capitan (disk0s4)
Also, everytime I install (and bless) refind, it gets the dimly lit black screen, so I restart it with the Option key held down, and boot into the first OS X. I then notice that under the preference pane for the startup disk, it has changed to BOOTCAMP/Windows...?
I am at a loss as to how to get all these boot issues fixed. Thank you all much for your help and advice,
According to this, https://apple.stackexchange.com/questions/57597/how-to-fix-broken-efi-partition , I apparently do not have the same problem as the OP did...
sbhs-MacBook-Pro:refind-bin-0.10.4 sbh$ sudo gpt -r show disk0 gpt show: disk0: Suspicious MBR at sector 0 start size index contents 0 1 MBR 1 1 Pri GPT header 2 32 Pri GPT table 34 6 40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640 392254992 2 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 392664632 262144 392926776 533068472 3 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 925995248 262144 926257392 487273856 4 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 1413531248 1269536 5 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC 1414800784 39064176 6 GPT part - 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F 1453864960 420589844 7 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 1874454804 261732 1874716536 79493256 8 GPT part - 0FC63DAF-8483-4772-8E79-3D69D8477DE4 1954209792 295 1954210087 32 Sec GPT table 1954210119 1 Sec GPT header
and in fact gdisk says it is okay...
sbhs-MacBook-Pro:refind-bin-0.10.4 sbh$ sudo gdisk /dev/disk0 GPT fdisk (gdisk) version 1.0.1 Warning: Devices opened with shared lock will not have their partition table automatically reloaded! Partition table scan: MBR: hybrid BSD: not present APM: not present GPT: present Found valid GPT with hybrid MBR; using GPT. Command (? for help): v No problems found. 786321 free sectors (383.9 MiB) available in 5 segments, the largest of which is 262144 (128.0 MiB) in size.
I reset NVRAM and SMC. Now the preference pane for startup in El Capitan does not have a selected startup disk. I re-disabled csrutil; still not journaled; no FileVault either