Yosemite won't but without installation USB nor from external HDD

[bperic83]

Hi,

 

I had great working dual-boot with WIndows10 and Yosemite (10.10.1 from YosemiteZone installation). I had a problem with Yosemite because it wouldn't boot from HDD, but it wanted installation USB inserted, and only in that way it would start boot menu where I could select Yosemite partition and after that it would start it and worked great. If I didn't insert USB it would boot in Win10, without any boot options offered.

 

My problem began yesterday - I bought SSD, installed Windows10 on it, and I put my old HDD in rack with 2 partitions I use as "windows data partitions" and 2 partitions as "mac partitions" (one has installed Yosemite on it, the other one is for experimenting with updates, so I could make backup on it).

Now when I connect it as external HDD through USB and select to boot first from USB I get error message that USB doesn't have OS installed on it (and, as I said, it HAS Yosemite on one of it's partitions).

If I put Yosemite installation USB too, system doesn't recognize it at all if both, external HDD and installation USB, are inserted, it always try to start from external HDD and can't find installed Yosemite on it.

If I try to boot just with Yosemite installation USB, and with externall HDD unpluged, it offers me to start setup from USB or to start Windows10 from SSD, and doesn't change when I plug-in external HDD during that screen. But if I start installation process from there it sees my Yosemite external HDD partition as available for Yosemite to install on.

 

Is there any way to boot my Yosemite from external HDD or it would be necessary to take a part of internal SSD as "system partition" and install Yosemite there, and to use external HDD partition as "data partition"?

 

 

EDIT: I just tried to boot from old iATKOS ML2 (10.8.2) DVD ... it started bootloader, there it sees all the drives (SSD, HDD with Yosemite partition, installation USB) but when I try to select my HDD Yosemite partition or installation USB I get the message "Can't find /mach_kernel", and that's it

Edited September 18, 2015 by bperic83

[duduclx]

you need to have a working conver config.plist relative to your systeme and yosemite,

and also have efi tools in /EFI/CLOVER/drivers64UEFI

• EmuVariableUefi-64
• OsxAptioFix2DRV-64
• FSInject-64.efi
• HFSPlus.efi
• OsxFatBinaryDrv-64.efi

Open EFI Volume and

:go to EFI/CLOVER/kexts/10.11 and EFI/CLOVER/kexts/others and paste:

• Fakesmc.kext

cheers

[bperic83]

But I don't have 10.11, I have 10.10.1 ... will this work for it, too?

Is it wnough just to paste or should I install it through Kext Utility? I manage to install 10.8.2 on second Mac partition, so it would be possible to install it on Yosemite partition by Kext Utility

 

tnx

[duduclx]

so, in the folder: EFI/CLOVER/kexts/10.10

 

that is EFI drive, no need to use kext installer (who install kext in /system/Library/Extensions).

just paste.

 

create a usb installer, install it to your internal hard drive (a partition or full drive)

after all is good, format your usb installer, and use it as data drive.

 

ps: you can keep a clover partition in your external drive (usb) in case of a broken one in the internal hard drive.

 

I think you have broke your partition schema, so mac won't boot.

you can reinstall it, or inject mach_kernel by booting on it on single user, mount drives, and copy files (advanced user).

 

or just reinstall.

[bperic83]

I tried to copy those files where you said they should be, but I don't have 10.10 folder, just "Others" (in EFI/CLOVER). I tried to reboot it, but it still says it can't find mach_kernel. Now I installed it on that other mac partition with CLover and after that with Chameleon bootloader, and it starts the bootloader but it won't boot Yosemite. I put it in verbose mode, and in one moment it just make screen dark and thats it :/ But there is no message of missing mach_kernel anymore.

 

EDIT: I just managed to boot to Yosemite from Clover, but only when I uncheck my Intel HD4000 from Clover Settings menu ... it is booted, but it runs slow and screen is blinking from time to time, because of Intel HD4000 disabled ... is there a way to solve this problem? If I try to boot with HD4000 enabled, the screen just goes dark after few verbose mode screen messages.