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Hi I did installation on external hard drive via usb and hackintosh works fine. I did that because installer do not detect internal hard drive. I have installed proper kexts on usb disk via kext wizard bus in sysinfo internal hard drive is not detected… I red that AHCIPortInjector or AHCI_3rdParty_SATA was the solution but it does not help. Can you give me any directions what to do?? Thanks

I followed your advice and installer is booting up normaly also with clover. I did bios update to A22 and changed SMBIOS to iMac10,1. When I perform everything I will place a small but very detailed howto.

Yes I did. I was doing everything acording to description. I used also the same version of clover from bootpack readme_clover_support. While booting I got error that this version is not supported so I changed smbios from detected MacBook2,1 to MacBook3,1 and MacPro3,1. After that I have always error appleacpiplatformexpert start failed. I was using all available boot options ie. -v -x -f acpi=off cpus=1 nv_disable=1 ncpi=0x2000 or 3000 dart=0 rootless=0 and all possible combinations. In my opinion I am missing something in clover configuration or bios. Is bootpack designed for a specific version of bios, maybe I can try with higher one ie A21 or A22? I am happy for any sugestions.

Dear All !! I am decided to write my post because I use all of my knowledge and feew days of time to install hackintosh on my optiplex 755. I red all posts from forum and google posts but I have no idea what to do, so I am asking for your help. My config is as folows and bios A19 ( I want to keep it if possible): QuadCore Intel Core 2 Quad Q6600 @ 2400 MHz Kentsfield (Northbridge) Intel Bearlake Q35 (Southbridge) Intel 82801IO ICH9DO 4 x 2GB DDR2-800Mhz DDR2 SDRAM Transcend Information, Inc. 250GB SSD NVIDIA GeForce 210 1GB DDR3 Intel® 82566DM-2 Gigabit LAN Onboard Analog Devices AD1984 Audio Onboard Philips 190S (190S5) 19" Monitor 1280â—Š1024 display USB Keyboard USB Mouse What I did: 1. I created my own dsdt and ssdt (no errors) 2. I have downloaded Clover backport for Yosemite/El Capitan and when I am booting up from usb stick I have always error: appleacpiplatformexpert start failed. I was changing all possible clover boot flags without success… I also used clover configurator to change smbios and config. I have all kexts also AppleACPIPlatform.kext but this do not help. If someone have time and want to help me I will reward that person with some value of money. My goal is to have El Capitan working on this hardware. In appendix I attached dump from Clover and report from Aida64. Please feel free to contact me. Best regards Greg origin.zip optiplex.htm