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  1. If you are confused by so many boot options chameleon has offered, here I want to show you some and their functionality. If you have downloaded the source file of chameleon at http://forge.voodooprojects.org/p/chameleon/source/tree/HEAD/, you can find the boothelp.txt inside Trunk(or other branch depends on your decision)/doc/ If you haven't, it doesn't matter. You can download it from this post. Here's the boothelp.txt with rev2136: BootHelp@2136.txt The boot: prompt waits for you to type advanced startup options. If you don't type anything, the computer continues starting up normally. It uses the kernel and configuration files on the startup device, which it also uses as the root device. Advanced startup options use the following syntax: [device]<kernel> [arguments] Example arguments include device: rd=<BSD device name> (e.g. rd=disk0s2) rd=*<IODeviceTree path> (e.g. rd=*/PCI0@0/CHN0@0/@0:1) kernel: kernel name (e.g. "mach_kernel" - must be in "/" ) flags: -v (verbose), -s (single user mode), -x (safe mode), -f (ignore caches), -F (ignore "Kernel Flags" specified in boot configuration file) "Graphics Mode"="WIDTHxHEIGHTxDEPTH" (e.g. "1024x768x32") kernel flags (e.g. debug=0x144) io=0xffffffff (defined in IOKit/IOKitDebug.h) Example: mach_kernel rd=disk0s1 -v "Graphics Mode"="1920x1200x32" If the computer won't start up properly, you may be able to start it up using safe mode. Type -x to start up in safe mode, which ignores all cached driver files. Special booter hotkeys: ----------------------- F5 Rescans optical drive. F10 Scans and displays all BIOS accessible drives. Special booter commands: ------------------------ ?memory Displays information about the computer's memory. ?video Displays VESA video modes supported by the computer's BIOS. ?norescan Leaves optical drive rescan mode. Additional useful command-line options: --------------------------------------- config=<file> Use an alternate Boot.plist file. Options useful in the org.chameleon.Boot.plist file: ---------------------------------------------------- Wait=Yes|No Prompt for a key press before starting the kernel. "Quiet Boot"=Yes|No Use quiet boot mode (no messages or prompt). Timeout=8 Number of seconds to pause at the boot: prompt. "Instant Menu"=Yes Force displaying the partition selection menu. "Default Partition" Sets the default boot partition, =hd(x,y)|UUID|"Label" Specified as a disk/partition pair, an UUID, or a label enclosed in quotes. "Hide Partition" Remove unwanted partition(s) from the boot menu. =partition Specified, possibly multiple times, as hd(x,y), an [;partition2 ...] UUID or label enclosed in quotes. "Rename Partition" Rename partition(s) for the boot menu. =partition <alias> Where partition is hd(x,y), UUID or label enclosed [;partition2 <alias2> in quotes. The alias can optionally be quoted too. ...] GUI=No Disable the GUI (enabled by default). "Boot Banner"=Yes|No Show boot banner in GUI mode (enabled by default). ShowInfo=No Disables display of partition and resolution details. "Boot Banner"=No will also disable this info. "Legacy Logo"=Yes|No Use the legacy grey apple logo (disabled by default). PciRoot=<value> Use an alternate value for PciRoot (default value 0). UseKernelCache=Yes|No Yes will load pre-linked kernel and will ignore /E/E and /S/L/E/Extensions.mkext. Default is No but Yes if you use Lion on a Raid partition. KeyLayout=keymap Use to change the keyboard mapping of the bootloader (e.g. KeyLayout=mac-fr) GraphicsEnabler=Yes|No Automatic device-properties generation for graphics cards. AtiConfig=<cardcfg> Use a different card config, e.g. AtiConfig=Megalodon. AtiPorts=<value> Specify the number of ports, e.g. AtiPorts=2. UseAtiROM=Yes|No Use an alternate Ati ROM image (default path: /Extra/<vendorid>_<devid>_<subsysid>.rom) UseNvidiaROM=Yes|No Use an alternate Nvidia ROM image (default path: /Extra/<vendorid>_<devid>.rom) VBIOS=Yes|No Inject VBIOS to device-properties. display_0=<value> Inject alternate value of display-cfg into NVDA,Display-A@0 (HEX). display_1=<value> Inject alternate value of display-cfg into NVDA,Display-B@1 (HEX). EnableHDMIAudio=Yes Inject HDMI audio for NVIDIA and ATI. EthernetBuiltIn=Yes|No Automatic "built-in"=YES device-properties generation for ethernet interfaces. ForceHPET=Yes|No Force HPET on (disabled by default). USBBusFix=Yes Enable the EHCI and UHCI fixes (disabled by default). EHCIacquire=Yes Enable the EHCI fix (disabled by default). UHCIreset=Yes Enable the UHCI fix (disabled by default). USBLegacyOff=Yes Force USB Legacy off (disabled by default). Wake=No Disable wake up after hibernation (enbaled by default). ForceWake=Yes Force using the sleepimage (disabled by default). WakeImage=<file> Use an alternate sleepimage file (default path is /private/var/vm/sleepimage). DropSSDT=Yes Skip the SSDT tables while relocating the ACPI tables. DSDT=<file> Use an alternate DSDT.aml file (default path: /DSDT.aml /Extra/DSDT.aml bt(0,0)/Extra/DSDT.aml). GenerateCStates=Yes Enable auto generation of processor idle sleep states (C-States). GeneratePStates=Yes Enable auto generation of processor power performance states (P-States). CSTUsingSystemIO=Yes New C-State _CST generation method using SystemIO registers instead of FixedHW. EnableC2State=Yes Enable specific Processor power state, C2. EnableC3State=Yes Enable specific Processor power state, C3. EnableC4State=Yes Enable specific Processor power state, C4. SMBIOS=<file> Use an alternate SMBIOS.plist file (default path: /SMBIOS.plist /Extra/SMBIOS.plist bt(0,0)/Extra/SMBIOS.plist). SMBIOSdefaults=No Don't use the Default values for SMBIOS overriding if smbios.plist doesn't exist, factory values are kept. "Scan Single Drive" Scan the drive only where the booter got loaded from. =Yes|No Fix rescan issues when using a DVD reader in AHCI mode. Rescan=Yes Enable CD-ROM rescan mode. "Rescan Prompt"=Yes Prompts for enable CD-ROM rescan mode. SystemId=<UUID> Set the system id manually to UUID. SMUUID in smbios config (reserved field) isn't used then. SystemType=<n> Set the system type to n, where n is between 0..6 (default=1 Desktop) md0=<file> Load raw img file into memory for use as XNU's md0 ramdisk. /Extra/Postboot.img is used otherwise.