cybermiguel Posted October 6, 2011 Share Posted October 6, 2011 Ok...here's the deal. I've got a Samsung laptop (model RV411-S04CL) which has the following specs: Intel Pentium Dual Core CPU (sandy bridge) Intel HM55 chipset nVidia GeForce 315M (512 MB) dedicated video card Realtek ALC269 audio Atheros AR9285 Wi-Fi Realtek PCI-E Gigabit Ethernet And I want to install OS X Lion. Now, what's the problem? Well... one of the curious things this laptop has is that it's BIOS is actually a Phoenix SecureCore UEFI firmware. I found it quite interesting, as in the firmware setup (or BIOS screen, if you want to call it) it allows me to choose if I want "legacy boot" or "UEFI boot". In my curiosity, I chose UEFI boot and installed Windows 7 x64 using GPT partitions (it's not hybrid....it's full GPT) and UEFI boot. In fact, the installer created an EFI system partition that has the bootloader in /efi/boot/bootx64.efi In other words...a full UEFI/GPT Windows 7 system working like it should. So, what's the deal? The deal is that I want to install Mac OS X Lion ALONG my Windows 7 UEFI/GPT installation. I searched on the internet for bootloaders that can boot ina UEFI environment and found two: XPC and [url="http://www.insanelymac.com/forum/topic/279450-why-insanelymac-does-not-support-tonymacx86/"]#####[/url]. Tried them both. Problem? Both got stuck at a blinking underscore and then the system tried to boot from the HDD (I pressed the ESC key so that it doesn't boot and boots again from the USB). When they actually load (the second time I hit ESC so the Windows bootloader doesn't start), they only show me the USB pendrive and neither the HDD nor the DVD drive. I tried to disable AHCI and I get both bootloaders to show the HDD and the DVD drive, which is good...except for the fact that when I try to boot Windows 7 with AHCI disabled, it crashes before it loads with a BSOD. Besides, I read that AHCI is necessary for Lion to work properly. So... got stuck at the bootloader and can't install a damn OS X distribution (neither iAtkos L1 nor stock Snow Leopard). What can I do? Am I doing something wrong? Link to comment Share on other sites More sharing options...
nikytamac Posted October 6, 2011 Share Posted October 6, 2011 site:bbs.pcbeta.com rv411 leopard Link to comment Share on other sites More sharing options...
cybermiguel Posted October 16, 2011 Author Share Posted October 16, 2011 site:bbs.pcbeta.com rv411 leopard Sorry, but I don't understand chinese. I used google translator and still didn't find any information about this issue. =/ Link to comment Share on other sites More sharing options...
Mutant Posted December 13, 2011 Share Posted December 13, 2011 Dear cybermiguel, I have a similiar problem. So I would like to ask what happened at your case? Is there any change? Could you install both win7 64 bit and lion together? I have a new Lenovo b570 laptop with UEFI bios. Opposite to your Samsung I do not have an option for legacy MBR boot. It directly boots UEFI system. I installed win7 64 bit on GPT partition. Now I am googling and searching on how to install lion (preferably iatkos) on GPT partiton. If I can find a solution for this, then I am planning to make a multiboot machine with w7 64 bit, iatkos and Ubuntu in one. Any recommendation is highly appreciated. Link to comment Share on other sites More sharing options...
Mutant Posted April 11, 2012 Share Posted April 11, 2012 Dear Cybermiguel, Any change at your situation? Could you succeed to instal Win7 x64 and Lion at your UEFI Laptop? Link to comment Share on other sites More sharing options...
artur_pt Posted April 11, 2012 Share Posted April 11, 2012 hi have u try the file boot.efi in every mac os x media install ? i dont think it works, but give a try, because macs boot with that file. and u bios, is a hybrid uefi, not equal to macs. in desktop with that new bios the boot is with chameleon good hack Link to comment Share on other sites More sharing options...
mendietinha Posted August 4, 2012 Share Posted August 4, 2012 here i change the scheme to mbr. got in the os x install disk utility, choose 2 partitions mbr scheme, install windows, after that mountain lion[with mbr patch]. fix the boot0 error and all is good now. 1 Link to comment Share on other sites More sharing options...
dmazar Posted August 4, 2012 Share Posted August 4, 2012 On some UEFIs it's possible to use Clover boot manager to boot OSX directly from UEFI. Link to comment Share on other sites More sharing options...
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