Mortandos

Q: Why can I only use 2.48 GB RAM in Boot Camp (Win 8.1 Pro, 64-bit)?

Hello, I am fairly new to the iMac and I have to use some programs in Windows that are not available for Mac so I set up Boot Camp and installed Windows 8.1.

 

My iMac is a I7-2600 CPU @ 3.4GHz with 16 GB RAM, system type-bit. Under system in Windows it shows Installed memory (RAM) 16 GB (2.48 GB usable).

 

I read about this problem and most answers are related to people using 32-bit. So what is wrong in my case, where is the problem?

 

Thank you in advance for help and suggestions. 

iMac, OS X Yosemite (10.10.3)

Posted on May 3, 2015 11:52 AM

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Q: Why can I only use 2.48 GB RAM in Boot Camp (Win 8.1 Pro, 64-bit)?

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  • by Mortandos,

    Mortandos Mortandos Jun 22, 2015 6:54 PM in response to Loner T
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    Jun 22, 2015 6:54 PM in response to Loner T

    and on the Windows laptop I need to run SysPrep which creates the image file?

     

    Since I'm still entertaining other options: How come that I can modify my info.plist (from the BCA) and it always results in BC to crash though I run the sudo codesign -fs - /Applications/Utilities/Boot\ Camp\ Assistant.app command in terminal?

  • by Loner T,

    Loner T Loner T Jun 22, 2015 6:59 PM in response to Mortandos
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    Jun 22, 2015 6:59 PM in response to Mortandos

    You need to use the --deep qualifier. See man codesign for details.

  • by Mortandos,

    Mortandos Mortandos Jun 22, 2015 7:09 PM in response to Loner T
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    Jun 22, 2015 7:09 PM in response to Loner T

    unfortunately I don't know what you're talking about. Is that regarding the terminal command? Can you please post the correct command?

     

    And regarding the question on the Windows laptop?!

  • by Loner T,

    Loner T Loner T Jun 22, 2015 7:23 PM in response to Mortandos
    Level 7 (24,770 points)
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    Jun 22, 2015 7:23 PM in response to Mortandos

    1. The command is sudo codesign --deep -fs - /Applications/Utilities/Boot\ Camp\ Assistant.app

    2. Did you look at https://twocanoes.zendesk.com/hc/en-us/articles/202636585-Migrating-a-Real-PC-to -Boot-Camp- . This is the most critical step. You will need to create an initial image of your partition before running Sysprep .

    3. I suggest you make a backup of the original PC to another disk, before you run any steps in this link.

  • by Mortandos,

    Mortandos Mortandos Jun 23, 2015 1:54 PM in response to Loner T
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    Jun 23, 2015 1:54 PM in response to Loner T

    1) this still results in "Boot Camp Assistant quit unexpectedly." Any idea why?

     

    I'll look in to #2 and #3 later, thank you.

  • by Loner T,

    Loner T Loner T Jun 23, 2015 3:08 PM in response to Mortandos
    Level 7 (24,770 points)
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    Jun 23, 2015 3:08 PM in response to Mortandos

    Please try

     

    sudo codesign --deep --verbose -fs - /Applications/Utilities/Boot\ Camp\ Assistant.app

  • by Mortandos,

    Mortandos Mortandos Jun 23, 2015 3:33 PM in response to Loner T
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    Jun 23, 2015 3:33 PM in response to Loner T

    This still results in "Boot Camp Assistant quit unexpectedly."


    About the sysprep procedure. It requires to get the hard disk out of the laptop which I would prefer to not do.


    I was wondering whether I can install a second Windows on the laptop on the external USB drive and then sysprep it and then connect it to the MAC afterwards. 

  • by Loner T,

    Loner T Loner T Jun 23, 2015 3:36 PM in response to Mortandos
    Level 7 (24,770 points)
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    Jun 23, 2015 3:36 PM in response to Mortandos

    Can you post the output of the codesign command?

     

    Unless you have a license to install Windows on an external drive, it will not work.

  • by Mortandos,

    Mortandos Mortandos Jun 23, 2015 4:43 PM in response to Loner T
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    Jun 23, 2015 4:43 PM in response to Loner T

    I am sorry, that was my bad, obviously it's not a good idea to leave a copy of the original info.plist in that folder, in terminal it said:

     

    /Applications/Utilities/Boot Camp Assistant.app: unsealed contents present in the bundle root

     

    After removing the file it works fine. So I will continue experimenting but if all else fails - are you using Boot Camp on your computer? Or would you be willing to install Windows / Boot Camp on your MAC and then Winclone it and send it to me (I have a pretty big Dropbox for example)? I'm out of options, it's nice to try and learn new things but at some point I would actually get it done.

  • by Loner T,

    Loner T Loner T Jun 23, 2015 5:02 PM in response to Mortandos
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    Jun 23, 2015 5:02 PM in response to Mortandos

    I do not have a Mac on which I can install a fresh copy. Can you wait till tomorrow, so I can get a Winclone on a spare Mac?

  • by Mortandos,

    Mortandos Mortandos Jun 23, 2015 5:41 PM in response to Loner T
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    Jun 23, 2015 5:41 PM in response to Loner T

    oh, whatever time you need.... that would be awesome, no rush please, I appreciate all the time and effort you spent to help. I found many other of your comments and help in different threads, thank you for your time.

  • by Mortandos,

    Mortandos Mortandos Jun 24, 2015 9:14 AM in response to Loner T
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    Jun 24, 2015 9:14 AM in response to Loner T

    Trying to understand the Boot Camp Assistant, now that through modifying the info.plist I can actually let the BCA create a bootable USB stick I am surprised that the operation fails. While copying the Windows files it eventually results in an error message and when I look at the stick then it's not wonder why. BCA formats the stick as FAT32 so when it's time to copy the Windows installation file it fails because of the file limitation. I have the original Windows 7 and Windows 8 DVD's, no downloaded copies, just as they come from Microsoft. How are other people doing that using the BCA? Shouldn't they run into the same problem?

  • by Loner T,

    Loner T Loner T Jun 24, 2015 9:30 AM in response to Mortandos
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    Jun 24, 2015 9:30 AM in response to Mortandos

    This is from my WININSTALL USB2.0 stick. Notice that I have a 3.6G file (the entire Windows 64-bit ISO file) on the USB.

     

    diskutil list

    /dev/disk0

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *1.0 TB     disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:                  Apple_HFS Macintosh HD            741.7 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data rMBPBCMP                258.0 GB   disk0s4

    /dev/disk1

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:     FDisk_partition_scheme                        *16.0 GB    disk1

       1:                 DOS_FAT_32 WININSTALL              16.0 GB    disk1s1

     

    diskutil info disk1

       Device Identifier:        disk1

       Device Node:              /dev/disk1

       Part of Whole:            disk1

       Device / Media Name:      SanDisk Cruzer Glide Media

     

       Volume Name:              Not applicable (no file system)

     

       Mounted:                  Not applicable (no file system)

     

       File System:              None

     

       Content (IOContent):      FDisk_partition_scheme

       OS Can Be Installed:      No

       Media Type:               Generic

       Protocol:                 USB

       SMART Status:             Not Supported

     

       Total Size:               16.0 GB (16008609792 Bytes) (exactly 31266816 512-Byte-Units)

       Volume Free Space:        Not applicable (no file system)

       Device Block Size:        512 Bytes

     

       Read-Only Media:          No

       Read-Only Volume:         Not applicable (no file system)

       Ejectable:                Yes

     

       Whole:                    Yes

       Internal:                 No

       OS 9 Drivers:             No

       Low Level Format:         Not supported

     

    ls -lh

    total 7622128

    drwxrwxrwx  1 MyName  staff   8.0K Nov 18  2014 $RECYCLE.BIN

    drwxrwxrwx  1 MyName  staff   8.0K Sep 23  2014 $WinPEDriver$

    -rwxrwxrwx  1 MyName  staff   102K Nov 18  2014 AMDr290x-14.2.PNG

    -rwxrwxrwx  1 MyName  staff   101K Nov 18  2014 AMDr290x-14.3.PNG

    -rwxrwxrwx  1 MyName  staff   2.8K Sep 23  2014 AutoUnattend.xml

    drwxrwxrwx  1 MyName  staff   8.0K Nov 17  2014 BootCamp

    -rwxrwxrwx@ 1 MyName  staff   370K Nov 18  2014 DeviceManager-1.PNG

    -rwxrwxrwx  1 MyName  staff   387K Nov 18  2014 DeviceManager-2.PNG

    drwxrwxrwx  1 MyName  staff   8.0K Nov 18  2014 System Volume Information

    -rwxrwxrwx  1 MyName  staff   3.6G Jul 26  2014 Windows8.1-64bit.cdr

    -rwxrwxrwx  1 MyName  staff   128B Aug 22  2013 autorun.inf

    drwxrwxrwx  1 MyName  staff   8.0K Aug 22  2013 boot

    -rwxrwxrwx  1 MyName  staff   418K Aug 22  2013 bootmgr

    -rwxrwxrwx  1 MyName  staff   1.5M Aug 22  2013 bootmgr.efi

    drwxrwxrwx  1 MyName  staff   8.0K Aug 22  2013 efi

    -rwxrwxrwx@ 1 MyName  staff   6.9K Nov 18  2014 imac5k-diskutil.rtf

    -rwxrwxrwx  1 MyName  staff    76K Aug 22  2013 setup.exe

    drwxrwxrwx  1 MyName  staff    16K Aug 22  2013 sources

    drwxrwxrwx  1 MyName  staff   8.0K Aug 22  2013 support

     

    Can you do the same with your USB2.0 stick with what you currently have on it?

  • by Mortandos,

    Mortandos Mortandos Jun 24, 2015 9:46 AM in response to Loner T
    Level 1 (0 points)
    Jun 24, 2015 9:46 AM in response to Loner T

    Here it is:

     

    diskutil info disk2

       Device Identifier:        disk2

       Device Node:              /dev/disk2

       Part of Whole:            disk2

       Device / Media Name:      Kingston DataTraveler 2.0 Media

     

       Volume Name:              Not applicable (no file system)

     

       Mounted:                  Not applicable (no file system)

     

       File System:              None

     

       Content (IOContent):      FDisk_partition_scheme

       OS Can Be Installed:      No

       Media Type:               Generic

       Protocol:                 USB

       SMART Status:             Not Supported

     

       Total Size:               15.6 GB (15610576896 Bytes) (exactly 30489408 512-Byte-Units)

       Volume Free Space:        Not applicable (no file system)

       Device Block Size:        512 Bytes

     

       Read-Only Media:          No

       Read-Only Volume:         Not applicable (no file system)

       Ejectable:                Yes

     

       Whole:                    Yes

       Internal:                 No

       OS 9 Drivers:             No

       Low Level Format:         Not supported

  • by Loner T,

    Loner T Loner T Jun 24, 2015 9:56 AM in response to Mortandos
    Level 7 (24,770 points)
    Safari
    Jun 24, 2015 9:56 AM in response to Mortandos

    I have had issues in the past with Kingston flash drives. Do you a SanDisk USB flash drive which 8GB or larger?

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