1 | The boot: prompt waits for you to type advanced startup options.␊ |
2 | If you don't type anything, the computer continues starting up normally. It␊ |
3 | uses the kernel and configuration files on the startup device, which it also␊ |
4 | uses as the root device. ␊ |
5 | ␊ |
6 | Advanced startup options use the following syntax:␊ |
7 | ␊ |
8 | [device]<kernel> [arguments]␊ |
9 | ␊ |
10 | Example arguments include␊ |
11 | ␊ |
12 | device: rd=<BSD device name> (e.g. rd=disk0s2)␊ |
13 | rd=*<IODeviceTree path> (e.g. rd=*/PCI0@0/CHN0@0/@0:1)␊ |
14 | ␊ |
15 | kernel: kernel name (e.g. "mach_kernel" - must be in "/" )␊ |
16 | ␊ |
17 | flags: -v (verbose) -s (single user mode) -x (safe mode) ␊ |
18 | -F (ignore "Kernel Flags" specified in boot configuration file)␊ |
19 | ␊ |
20 | "Graphics Mode"="WIDTHxHEIGHTxDEPTH" (e.g. "1024x768x32")␊ |
21 | ␊ |
22 | kernel flags (e.g. debug=0x144)␊ |
23 | io=0xffffffff (defined in IOKit/IOKitDebug.h)␊ |
24 | ␊ |
25 | Example: mach_kernel rd=disk0s1 -v "Graphics Mode"="1920x1200x32"␊ |
26 | ␊ |
27 | If the computer won't start up properly, you may be able to start it up ␊ |
28 | using safe mode. Type -x to start up in safe mode, which ignores all ␊ |
29 | cached driver files.␊ |
30 | ␊ |
31 | Special booter hotkeys:␊ |
32 | F5 Rescans optical drive.␊ |
33 | F10 Scans and displays all BIOS accessible drives.␊ |
34 | ␊ |
35 | Special booter commands:␊ |
36 | ?memory Displays information about the computer's memory.␊ |
37 | ?video Displays VESA video modes supported by the computer's BIOS.␊ |
38 | ?norescan Leaves optical drive rescan mode.␊ |
39 | ␊ |
40 | Additional useful command-line options:␊ |
41 | config=<file> Use an alternate Boot.plist file.␊ |
42 | ␊ |
43 | Options useful in the com.apple.Boot.plist file:␊ |
44 | Wait=Yes|No Prompt for a key press before starting the kernel.␊ |
45 | "Quiet Boot"=Yes|No Use quiet boot mode (no messages or prompt).␊ |
46 | Timeout=8 Number of seconds to pause at the boot: prompt.␊ |
47 | "Instant Menu"=Yes Force displaying the partition selection menu. ␊ |
48 | ␊ |
49 | "Default Partition" Sets the default boot partition,␊ |
50 | =hd(x,y)|UUID|"Label" Specified as a disk/partition pair, an UUID, or a ␊ |
51 | label enclosed in quotes.␊ |
52 | ␊ |
53 | "Hide Partition" Remove unwanted partition(s) from the boot menu.␊ |
54 | =partition Specified, possibly multiple times, as hd(x,y), an␊ |
55 | [;partition2 ...] UUID or label enclosed in quotes.␊ |
56 | ␊ |
57 | "Rename Partition" Rename partition(s) for the boot menu.␊ |
58 | =partition <alias> Where partition is hd(x,y), UUID or label enclosed␊ |
59 | [;partition2 <alias2> in quotes. The alias can optionally be quoted too. ␊ |
60 | ...]␊ |
61 | ␊ |
62 | GUI=No Disable the GUI (enabled by default).␊ |
63 | "Boot Banner"=Yes|No Show boot banner in GUI mode (enabled by default).␊ |
64 | "Legacy Logo"=Yes|No Use the legacy grey apple logo (disabled by default).␊ |
65 | ␊ |
66 | PciRoot=<value> Use an alternate value for PciRoot (default value 0).␊ |
67 | ␊ |
68 | GraphicsEnabler=Yes|No Automatic device-properties generation for gfx cards.␊ |
69 | UseAtiROM=Yes|No Use an alternate Ati ROM image ␊ |
70 | (path: /Extra/<vendorid>_<devid>.rom)␊ |
71 | UseNvidiaROM=Yes|No Use an alternate Nvidia ROM image ␊ |
72 | (path: /Extra/<vendorid>_<devid>.rom)␊ |
73 | VBIOS=Yes|No Inject VBIOS to device-properties.␊ |
74 | ␊ |
75 | EthernetBuiltIn=Yes|No Automatic "built-in"=yes device-properties generation␊ |
76 | for ethernet interfaces.␊ |
77 | ␊ |
78 | USBBusFix=Yes Enable all USB fixes below:␊ |
79 | EHCIacquire=Yes Enable the EHCI fix (disabled by default).␊ |
80 | UHCIreset=Yes Enable the UHCI fix (disabled by default).␊ |
81 | USBLegacyOff=Yes Enable the USB Legacy fix (disabled by default).␊ |
82 | ␊ |
83 | ForceHPET=Yes|No Force Enable HPET.␊ |
84 | ␊ |
85 | Wake=No Disable wake up after hibernation (default: enabled).␊ |
86 | ForceWake=Yes Force using the sleepimage (disabled by default).␊ |
87 | WakeImage=<file> Use an alternate sleepimage file. ␊ |
88 | (default path is /private/var/vm/sleepimage).␊ |
89 | ␊ |
90 | DropSSDT=Yes Skip the SSDT tables while relocating the ACPI tables.␊ |
91 | DSDT=<file> Use an alternate DSDT.aml file ␊ |
92 | (default path: /DSDT.aml /Extra/DSDT.aml).␊ |
93 | ␊ |
94 | SMBIOS=<file> Use an alternate smbios.plist file ␊ |
95 | (default path: /smbios.plist /Extra/smbios.plist␊ |
96 | bt(0,0)/Extra/smbios.plist).␊ |
97 | ␊ |
98 | SMBIOSdefaults=No Don't use the Default values for SMBIOS overriding␊ |
99 | if smbios.plist doesn't exist, factory␊ |
100 | values are kept.␊ |
101 | ␊ |
102 | "Scan Single Drive" Scan the drive only where the booter got loaded from.␊ |
103 | =Yes|No Fix rescan pbs when using a DVD reader in AHCI mode. ␊ |
104 | Rescan=Yes Enable CD-ROM rescan mode.␊ |
105 | "Rescan Prompt"=Yes Prompts for enable CD-ROM rescan mode.␊ |
106 | SystemId=<UUID> Set manually the system id UUID,␊ |
107 | SMUUID in smbios config (reserved field) isn't used.␊ |
108 | SystemType=<n> Set the system type where n is between 0..6␊ |
109 | (default =1 (Desktop)␊ |
110 | md0=<file> Load raw img file into memory for use as XNU's md0␊ |
111 | ramdisk. /Extra/Postboot.img is used otherwise.␊ |
112 | |