Andrewcee Posted April 1, 2021 Share Posted April 1, 2021 HOW TO GET OSX TO BOOT FROM HARDDISK? Running Legacy BIOS... Have built OpenCore (O/C) config, written to USB, which boots and have successfully built High Sierra on standalone Samsung 500GB harddisk partitioned GPT. Can boot USB, select 'High Sierra', OSX starts up from harddisk & runs perfectly. 1. Have created new O/C config on harddisk & run Legacy Bootinstaller x64 tool - quick flash of drive led then nothing. 2. Have copied across the USB OC & Boot folders to harddisk, run Bootinstaller - same result. 3. Have tried 'RAID' and 'ACHI' options in Bios - same result. 4. Have connected to on-board JMicron controller set to 'ACHI' - will not boot having even selected from USB. Guessing Bios is accessing the harddisk, yet unable to boot the disk / find the boot loader in the MBR / ????? Help, please??!! Ancient hardware, circa 2008... M/B: GA-EP35C-DS3R (Intel ICH9 chipset) CPU: Intel QX9650 GPU: Asus NVidea GX680 RAM: Kingston 8GB DDR3 Link to comment Share on other sites More sharing options...
Andrewcee Posted April 2, 2021 Author Share Posted April 2, 2021 Have manually set the EFI partition active using fdisk from the recovery console. Still the same. I have another motherboard with a Q9650 fitted. I'll try the disk on the other system..... Link to comment Share on other sites More sharing options...
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