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All replies
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Helpful answers
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May 4, 2015 8:04 PM in response to Mortandosby Loner T,Your 2011 iMac is a preUEFI Mac (all Macs prior to Late 2013 models are). The preUEFI Macs support varying degrees of EFI boot capability, but do not fully comply with UEFI specifications. This causes various BC drivers to work, not work, or partially work, depending the year of the Mac and the OS used.
There are two methods that have been "successful" in working around broken Optical drives (apart from replacing it).
1. http://forums.macrumors.com/showthread.php?p=20584499#post20584499
2. Bootcamp without Optical disc drive
My recommendation is to remove Windows using BC Assistant (only, nothing else), and then try either of these two methods. You want a legacy BIOS installation (aka Hybrid MBR method). The CSM-BIOS layer correctly exposes hardware for preUEFI machines. It will also address your memory visibility issue.
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May 5, 2015 9:53 AM in response to Loner Tby Mortandos,Ok, I will need some time to look into that. When starting the boot camp assistant I'm getting an error message though:
The startup disk cannot be partitioned or restored to a single partition. I'm using an external SSD for MACOS, is there any disadvantage in formatting the internal HD (which is meant to be for Boot Camp / Windows manually?
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May 5, 2015 10:03 AM in response to Mortandosby Loner T,Do you plan to use the full internal disk for Windows?
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May 5, 2015 1:40 PM in response to Mortandosby Loner T,No there is no downside. If you plan to use the entire disk, you should install a small disposable OSX installation (16-32GB) and install Windows on the rest of the disk. The external OSX disk is really not necessary. The advantage is that you can run OSX from the same disk, if there are any issues for Windows recovery.
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May 5, 2015 1:48 PM in response to Loner Tby Mortandos,So how do I proceed now since the Boot Camp assistant is giving me this error message: The startup disk cannot be partitioned or restored to a single partition.
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May 5, 2015 1:50 PM in response to Mortandosby Loner T,Can you post the output of the following Terminal commands?
diskutil list
diskutil cs list
sudo gpt -vv -r show /dev/disk0
sudo fdisk /dev/disk0
The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.
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May 5, 2015 2:11 PM in response to Loner Tby Mortandos,/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI NO NAME 209.7 MB disk0s1
2: Microsoft Reserved 125.8 MB disk0s2
3: Microsoft Basic Data Windows 524.3 GB disk0s3
4: Microsoft Basic Data MACINT 475.6 GB disk0s4
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *256.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_HFS MAC SSD 255.2 GB disk1s2
3: Apple_Boot Recovery HD 650.0 MB disk1s3
diskutil cs list
No CoreStorage logical volume groups found
sudo gpt -vv -r show /dev/disk0gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168
gpt show: /dev/disk0: PMBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 1953525167
start size index contents
0 1 PMBR
1 1 Pri GPT header
2 32 Pri GPT table
34 2014
2048 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
411648 245760 2 GPT part - E3C9E316-0B5C-4DB8-817D-F92DF00215AE
657408 1024000000 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1024657408 928864256 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1953521664 3471
1953525135 32 Sec GPT table
1953525167 1 Sec GPT header
sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: EE 0 0 2 - 1023 255 63 [ 1 - 4294967295] <Unknown ID>
2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
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May 5, 2015 2:46 PM in response to Mortandosby Loner T,BCA is confused between the Startup Disk (SSD) and the 1TB disk. Is there data on the 1TB disk that you want to save? If the whole disk will be used, would you be willing to reformat it as an MBR disk for Windows after you save your data?
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May 5, 2015 3:47 PM in response to Loner Tby Mortandos,I unlplug(ged) the SSD when using Windows.
There is nothing really important on the 1 TB disk and I would be willing to reformat it as a MBR disk for Windows. Based on this - how would you proceed?
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May 5, 2015 4:04 PM in response to Mortandosby Loner T,My suggestion is to create a USB OS X installation on a 16GB flash using OS X: Installing OS X on an external volume - Apple Support. Use this USB to boot, run BCA and format the internal disk as an MBR disk, and install Windows.
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May 5, 2015 6:40 PM in response to Loner Tby Mortandos,1) Why the USB installation - so that the SSD isn't connected? 2) Does the BCA format the internal drive as a MBR or do I have to do that manually?
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May 5, 2015 6:46 PM in response to Mortandosby Loner T,BCA (and Windows installer) get confused when two storage devices which are potential candidates for installation, one external, one internal, are connected. A USB flash device for booting addresses this issue. BCA will create a Hybrid MBR drive. You should format it as MBR before you start BCA.
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May 5, 2015 7:06 PM in response to Loner Tby Mortandos,Why does it make a difference for BCA whether I boot OS X from a SSD or from a USB? Both are external storage devices.
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May 5, 2015 7:37 PM in response to Mortandosby Loner T,There are significant differences, between the two types. If you boot from either device and run diskutil info / and look at differences between the two, it makes it easier to explain.
Here is an example of what problems can be created when using an external and an internal storage - "We couldn't create a new partition or locate an existing one. Form more information, see setup log files".
Please also see Boot Camp: Windows installation boots to black screen with blinking cursor - Apple Support.