MacBook Air 6,1 Bootloader

Question

I have a Macbook Air 2013, 6,1. I have been trying to use rEFInd as the bootloader, but I can't seem to make it work. Here's how I have my partition's set up:
sda1 EFI (vfat)
sda2 Mac OS X (HFS+)
sda3 Mac OS Recovery
sda4 / (ext4)
sda5 swap
I have sda1 mounted on /boot based on this forum comment. After calling mkinitcpio according to the Beginner's Guide, the kernel entry appeared in rEFInd's menu. When I try to boot from it, however, I get the following error:
Unable to find root device ''
What am I doing wrong?

Answer 1

Yeah, I haven't done any special configuration of rEFInd. Here's the conf after I installed it from Mac OS:
# refind.conf
# Configuration file for the rEFInd boot menu
# Timeout in seconds for the main menu screen. Setting the timeout to 0
# disables automatic booting (i.e., no timeout).
timeout 20
# Screen saver timeout; the screen blanks after the specified number of
# seconds with no keyboard input. The screen returns after most keypresses
# (unfortunately, not including modifier keys such as Shift, Control, Alt,
# or Option). The default is 0, which disables the screen saver.
#screensaver 300
# Hide user interface elements for personal preference or to increase
# security:
# banner - the rEFInd title banner (built-in or loaded via "banner")
# label - boot option text label in the menu
# singleuser - remove the submenu options to boot Mac OS X in single-user
# or verbose modes; affects ONLY MacOS X
# safemode - remove the submenu option to boot Mac OS X in "safe mode"
# hwtest - the submenu option to run Apple's hardware test
# arrows - scroll arrows on the OS selection tag line
# hints - brief command summary in the menu
# editor - the options editor (+, F2, or Insert on boot options menu)
# all - all of the above
# Default is none of these (all elements active)
#hideui singleuser
#hideui all
# Set the name of a subdirectory in which icons are stored. Icons must
# have the same names they have in the standard directory. The directory
# name is specified relative to the main rEFInd binary's directory. If
# an icon can't be found in the specified directory, an attempt is made
# to load it from the default directory; thus, you can replace just some
# icons in your own directory and rely on the default for others.
# Default is "icons".
#icons_dir myicons
# Use a custom title banner instead of the rEFInd icon and name. The file
# path is relative to the directory where refind.efi is located. The color
# in the top left corner of the image is used as the background color
# for the menu screens. Currently uncompressed BMP images with color
# depths of 24, 8, 4 or 1 bits are supported, as well as PNG images.
#banner hostname.bmp
#banner mybanner.png
# Custom images for the selection background. There is a big one (144 x 144)
# for the OS icons, and a small one (64 x 64) for the function icons in the
# second row. If only a small image is given, that one is also used for
# the big icons by stretching it in the middle. If only a big one is given,
# the built-in default will be used for the small icons.
# Like the banner option above, these options take a filename of an
# uncompressed BMP image file with a color depth of 24, 8, 4, or 1 bits,
# or a PNG image. The PNG format is required if you need transparency
# support (to let you "see through" to a full-screen banner).
#selection_big selection-big.bmp
#selection_small selection-small.bmp
# Set the font to be used for all textual displays in graphics mode.
# The font must be a PNG file with alpha channel transparency. It must
# contain ASCII characters 32-126 (space through tilde), inclusive, plus
# a glyph to be displayed in place of characters outside of this range,
# for a total of 96 glyphs. Only monospaced fonts are supported. Fonts
# may be of any size, although large fonts can produce display
# irregularities.
# The default is rEFInd's built-in font, Luxi Mono Regular 12 point.
#font myfont.png
# Use text mode only. When enabled, this option forces rEFInd into text mode.
# Passing this option a "0" value causes graphics mode to be used. Pasing
# it no value or any non-0 value causes text mode to be used.
# Default is to use graphics mode.
#textonly
# Set the EFI text mode to be used for textual displays. This option
# takes a single digit that refers to a mode number. Mode 0 is normally
# 80x25, 1 is sometimes 80x50, and higher numbers are system-specific
# modes. Mode 1024 is a special code that tells rEFInd to not set the
# text mode; it uses whatever was in use when the program was launched.
# If you specify an invalid mode, rEFInd pauses during boot to inform
# you of valid modes.
# CAUTION: On VirtualBox, and perhaps on some real computers, specifying
# a text mode and uncommenting the "textonly" option while NOT specifying
# a resolution can result in an unusable display in the booted OS.
# Default is 1024 (no change)
#textmode 2
# Set the screen's video resolution. Pass this option either:
# * two values, corresponding to the X and Y resolutions
# * one value, corresponding to a GOP (UEFI) video mode
# Note that not all resolutions are supported. On UEFI systems, passing
# an incorrect value results in a message being shown on the screen to
# that effect, along with a list of supported modes. On EFI 1.x systems
# (e.g., Macintoshes), setting an incorrect mode silently fails. On both
# types of systems, setting an incorrect resolution results in the default
# resolution being used. A resolution of 1024x768 usually works, but higher
# values often don't.
# Default is "0 0" (use the system default resolution, usually 800x600).
#resolution 1024 768
#resolution 3
# Launch specified OSes in graphics mode. By default, rEFInd switches
# to text mode and displays basic pre-launch information when launching
# all OSes except OS X. Using graphics mode can produce a more seamless
# transition, but displays no information, which can make matters
# difficult if you must debug a problem. Also, on at least one known
# computer, using graphics mode prevents a crash when using the Linux
# kernel's EFI stub loader. You can specify an empty list to boot all
# OSes in text mode.
# Valid options:
# osx - Mac OS X
# linux - A Linux kernel with EFI stub loader
# elilo - The ELILO boot loader
# grub - The GRUB (Legacy or 2) boot loader
# windows - Microsoft Windows
# Default value: osx
#use_graphics_for osx,linux
# Which non-bootloader tools to show on the tools line, and in what
# order to display them:
# shell - the EFI shell (requires external program; see rEFInd
# documentation for details)
# memtest - the memtest86 program, in EFI/tools, EFI/memtest86,
# EFI/memtest, EFI/tools/memtest86, or EFI/tools/memtest
# gptsync - the (dangerous) gptsync.efi utility (requires external
# program; see rEFInd documentation for details)
# apple_recovery - boots the Apple Recovery HD partition, if present
# mok_tool - makes available the Machine Owner Key (MOK) maintenance
# tool, MokManager.efi, used on Secure Boot systems
# about - an "about this program" option
# exit - a tag to exit from rEFInd
# shutdown - shuts down the computer (a bug causes this to reboot
# EFI systems)
# reboot - a tag to reboot the computer
# firmware - a tag to reboot the computer into the firmware's
# user interface (ignored on older computers)
# Default is shell,memtest,apple_recovery,mok_tool,about,shutdown,reboot,firmware
#showtools shell, memtest, mok_tool, about, reboot, exit, firmware
# Directories in which to search for EFI drivers. These drivers can
# provide filesystem support, give access to hard disks on plug-in
# controllers, etc. In most cases none are needed, but if you add
# EFI drivers and you want rEFInd to automatically load them, you
# should specify one or more paths here. rEFInd always scans the
# "drivers" and "drivers_{arch}" subdirectories of its own installation
# directory (where "{arch}" is your architecture code); this option
# specifies ADDITIONAL directories to scan.
# Default is to scan no additional directories for EFI drivers
#scan_driver_dirs EFI/tools/drivers,drivers
# Which types of boot loaders to search, and in what order to display them:
# internal - internal EFI disk-based boot loaders
# external - external EFI disk-based boot loaders
# optical - EFI optical discs (CD, DVD, etc.)
# hdbios - BIOS disk-based boot loaders
# biosexternal - BIOS external boot loaders (USB, eSATA, etc.)
# cd - BIOS optical-disc boot loaders
# manual - use stanzas later in this configuration file
# Note that the legacy BIOS options require firmware support, which is
# not present on all computers.
# On UEFI PCs, default is internal,external,optical,manual
# On Macs, default is internal,hdbios,external,biosexternal,optical,cd,manual
#scanfor internal,external,optical,manual
# Delay for the specified number of seconds before scanning disks.
# This can help some users who find that some of their disks
# (usually external or optical discs) aren't detected initially,
# but are detected after pressing Esc.
# The default is 0.
#scan_delay 5
# When scanning volumes for EFI boot loaders, rEFInd always looks for
# Mac OS X's and Microsoft Windows' boot loaders in their normal locations,
# and scans the root directory and every subdirectory of the /EFI directory
# for additional boot loaders, but it doesn't recurse into these directories.
# The also_scan_dirs token adds more directories to the scan list.
# Directories are specified relative to the volume's root directory. This
# option applies to ALL the volumes that rEFInd scans UNLESS you include
# a volume name and colon before the directory name, as in "myvol:/somedir"
# to scan the somedir directory only on the filesystem named myvol. If a
# specified directory doesn't exist, it's ignored (no error condition
# results). The default is to scan the "boot" directory in addition to
# various hard-coded directories.
#also_scan_dirs boot,ESP2:EFI/linux/kernels
# Partitions to omit from scans. You must specify a volume by its
# label, which you can obtain in an EFI shell by typing "vol", from
# Linux by typing "blkid /dev/{devicename}", or by examining the
# disk's label in various OSes' file browsers.
# The default is "Recovery HD".
#dont_scan_volumes "Recovery HD"
# Directories that should NOT be scanned for boot loaders. By default,
# rEFInd doesn't scan its own directory, the EFI/tools directory, the
# EFI/memtest directory, or the EFI/memtest86 directory. Using the
# dont_scan_dirs option enables you to "blacklist" other directories;
# but note that using this option removes the EFI/memtest and
# EFI/memtest86 directories, so if you don't want them scanned, be
# sure to include them in your new list. You might use this token to
# keep EFI/boot/bootx64.efi out of the menu if that's a duplicate of
# another boot loader or to exclude a directory that holds drivers
# or non-bootloader utilities provided by a hardware manufacturer. If
# a directory is listed both here and in also_scan_dirs, dont_scan_dirs
# takes precedence. Note that this blacklist applies to ALL the
# filesystems that rEFInd scans, not just the ESP, unless you precede
# the directory name by a filesystem name, as in "myvol:EFI/somedir"
# to exclude EFI/somedir from the scan on the myvol volume but not on
# other volumes.
#dont_scan_dirs ESP:/EFI/boot,EFI/Dell,EFI/memtest86
# Files that should NOT be included as EFI boot loaders (on the
# first line of the display). If you're using a boot loader that
# relies on support programs or drivers that are installed alongside
# the main binary or if you want to "blacklist" certain loaders by
# name rather than location, use this option. Note that this will
# NOT prevent certain binaries from showing up in the second-row
# set of tools. Most notably, MokManager.efi is in this blacklist,
# but will show up as a tool if present in certain directories. You
# can control the tools row with the showtools token.
# The default is shim.efi,PreLoader.efi,TextMode.efi,ebounce.efi,GraphicsConsole.efi,MokManager.efi,HashTool.efi,HashTool-signed.efi
#dont_scan_files shim.efi,MokManager.efi
# Scan for Linux kernels that lack a ".efi" filename extension. This is
# useful for better integration with Linux distributions that provide
# kernels with EFI stub loaders but that don't give those kernels filenames
# that end in ".efi", particularly if the kernels are stored on a
# filesystem that the EFI can read. When uncommented, this option causes
# all files in scanned directories with names that begin with "vmlinuz"
# or "bzImage" to be included as loaders, even if they lack ".efi"
# extensions. The drawback to this option is that it can pick up kernels
# that lack EFI stub loader support and other files. Passing this option
# a "0" value causes kernels without ".efi" extensions to NOT be scanned;
# passing it alone or with any other value causes all kernels to be scanned.
# Default is to NOT scan for kernels without ".efi" extensions.
scan_all_linux_kernels
# Set the maximum number of tags that can be displayed on the screen at
# any time. If more loaders are discovered than this value, rEFInd shows
# a subset in a scrolling list. If this value is set too high for the
# screen to handle, it's reduced to the value that the screen can manage.
# If this value is set to 0 (the default), it's adjusted to the number
# that the screen can handle.
#max_tags 0
# Set the default menu selection. The available arguments match the
# keyboard accelerators available within rEFInd. You may select the
# default loader using:
# - A digit between 1 and 9, in which case the Nth loader in the menu
# will be the default.
# - Any substring that corresponds to a portion of the loader's title
# (usually the OS's name or boot loader's path).
#default_selection 1
# Include a secondary configuration file within this one. This secondary
# file is loaded as if its options appeared at the point of the "include"
# token itself, so if you want to override a setting in the main file,
# the secondary file must be referenced AFTER the setting you want to
# override. Note that the secondary file may NOT load a tertiary file.
#include manual.conf
# Sample manual configuration stanzas. Each begins with the "menuentry"
# keyword followed by a name that's to appear in the menu (use quotes
# if you want the name to contain a space) and an open curly brace
# ("{"). Each entry ends with a close curly brace ("}"). Common
# keywords within each stanza include:
# volume - identifies the filesystem from which subsequent files
# are loaded. You can specify the volume by label or by
# a number followed by a colon (as in "0:" for the first
# filesystem or "1:" for the second).
# loader - identifies the boot loader file
# initrd - Specifies an initial RAM disk file
# icon - specifies a custom boot loader icon
# ostype - OS type code to determine boot options available by
# pressing Insert. Valid values are "MacOS", "Linux",
# "Windows", and "XOM". Case-sensitive.
# graphics - set to "on" to enable graphics-mode boot (useful
# mainly for MacOS) or "off" for text-mode boot.
# Default is auto-detected from loader filename.
# options - sets options to be passed to the boot loader; use
# quotes if more than one option should be passed or
# if any options use characters that might be changed
# by rEFInd parsing procedures (=, /, #, or tab).
# disabled - use alone or set to "yes" to disable this entry.
# Note that you can use either DOS/Windows/EFI-style backslashes (\)
# or Unix-style forward slashes (/) as directory separators. Either
# way, all file references are on the ESP from which rEFInd was
# launched.
# Use of quotes around parameters causes them to be interpreted as
# one keyword, and for parsing of special characters (spaces, =, /,
# and #) to be disabled. This is useful mainly with the "options"
# keyword. Use of quotes around parameters that specify filenames is
# permissible, but you must then use backslashes instead of slashes,
# except when you must pass a forward slash to the loader, as when
# passing a root= option to a Linux kernel.
# Below are several sample boot stanzas. All are disabled by default.
# Find one similar to what you need, copy it, remove the "disabled" line,
# and adjust the entries to suit your needs.
# A sample entry for a Linux 3.3 kernel with its new EFI boot stub
# support on a filesystem called "KERNELS". This entry includes
# Linux-specific boot options and specification of an initial RAM disk.
# Note uses of Linux-style forward slashes, even in the initrd
# specification. Also note that a leading slash is optional in file
# specifications.
menuentry Linux {
icon EFI/refind/icons/os_linux.icns
volume KERNELS
loader bzImage-3.3.0-rc7
initrd initrd-3.3.0.img
options "ro root=UUID=5f96cafa-e0a7-4057-b18f-fa709db5b837"
disabled
# A sample entry for loading Ubuntu using its standard name for
# its GRUB 2 boot loader. Note uses of Linux-style forward slashes
menuentry Ubuntu {
loader /EFI/ubuntu/grubx64.efi
icon /EFI/refined/icons/os_linux.icns
disabled
# A minimal ELILO entry, which probably offers nothing that
# auto-detection can't accomplish.
menuentry "ELILO" {
loader \EFI\elilo\elilo.efi
disabled
# Like the ELILO entry, this one offers nothing that auto-detection
# can't do; but you might use it if you want to disable auto-detection
# but still boot Windows....
menuentry "Windows 7" {
loader \EFI\Microsoft\Boot\bootmgfw.efi
disabled
# EFI shells are programs just like boot loaders, and can be
# launched in the same way. You can pass a shell the name of a
# script that it's to run on the "options" line. The script
# could initialize hardware and then launch an OS, or it could
# do something entirely different.
menuentry "Windows via shell script" {
icon \EFI\refind\icons\os_win.icns
loader \EFI\tools\shell.efi
options "fs0:\EFI\tools\launch_windows.nsh"
disabled
# Mac OS is normally detected and run automatically; however,
# if you want to do something unusual, a manual boot stanza may
# be the way to do it. This one does nothing very unusual, but
# it may serve as a starting point. Note that you'll almost
# certainly need to change the "volume" line for this example
# to work.
menuentry "My Mac OS X" {
icon \EFI\refind\icons\os_mac.icns
volume "OS X boot"
loader \System\Library\CoreServices\boot.efi
disabled