qwerty12

Hey,

I also get x28 as the maximum with my 2670QM (patched BIOS, patched original DSDT [although PikeRAlpha's ssdtPRGen gives me 28 as max also]):
 Screen Shot 2013-05-16 at 05.24.07 PM.png   69.64K   4 downloads

This probably isn't an OS X problem, however; 2.80 GHz is what seems to be reported under Windows, too:
 Screenshot (4).png   42.98K   8 downloads

This thread explains (I think) why.

Great news, people. AppleHDA works with this laptop now. Read the (short) sound section in the guide on how to set up AppleHDA.
For those who are already running OS X on their N55SLs and using VoodooHDA, remember to install the new DSDT from the Extras zip, too.

To uninstall VoodooHDA, remove the following files:

• /Library/PreferencePanes/VoodooHDA.prefPane
  
• /Applications/VoodooHdaSettingsLoader
  
• /System/Library/Extensions/VoodooHDA.kext
  
• /usr/local/bin/devls
  
• /usr/local/bin/getExtdump
  
• /usr/local/bin/getdump
  
• /usr/local/bin/voodoohda-uninstall
  
• /usr/local/bin/voodoohdahelper
  
• ~/Library/Preferences/VoodooHDA.settings.plist
  
• ~/Library/Preferences/VoodooHda.VoodooHdaSettingsLoader.plist

EDIT: Now featuring the removal of the "Sound assertion" messages. Sadly, this is done in the dirtiest way possible...

For anyone using Homebrew, here's an iasl formula:

require 'formula'
class Iasl < Formula
  homepage 'https://www.acpica.org'
  url 'https://acpica.org/sites/acpica/files/acpica-unix-20130418.tar.gz'
  def patches
	DATA
  end
  def install
	ENV.j1
	bin.mkpath
	system "make iasl HOST=_LINUX"
	system "make install PROGS=iasl INSTALLDIR=#{bin}"
  end
  def test
	system "#{bin}/iasl -v"
  end
end
__END__
# BSD cp doesn't understand --remove-destination so use -force instead
diff --git a/generate/unix/Makefile.config b/generate/unix/Makefile.config
index 65242e0..14e49c4 100644
--- a/generate/unix/Makefile.config
+++ b/generate/unix/Makefile.config
@@ -61,7 +61,7 @@ RENAMEPROG = \
#
COPYPROG = \
  @mkdir -p ../$(BINDIR); \
- cp --remove-destination $(PROG) ../$(BINDIR); \
+ cp -f $(PROG) ../$(BINDIR); \
  echo "Copied $(PROG) to $(FINAL_PROG)";
#
# BSD install recursive directory creating won't let you copy the file also,
# unlike GNU's. Just have install install the correct binary and rely on
# bin.mkpath to create the destdir beforehand
diff --git a/generate/unix/Makefile.config b/generate/unix/Makefile.config
index 14e49c4..62eb4eb 100644
--- a/generate/unix/Makefile.config
+++ b/generate/unix/Makefile.config
@@ -45,7 +45,7 @@ BITSFLAG =   -m$(BITS)
COMPILEOBJ = $(CC) -c $(CFLAGS) $(OPT_CFLAGS) -o $@ $<
LINKPROG =   $(CC) $(OBJECTS) -o $(PROG) $(LDFLAGS)
INSTALLDIR = /usr/bin
-INSTALLPROG = install -D ../$(BINDIR)/$(PROG) $(DESTDIR)$(INSTALLDIR)/$(PROG)
+INSTALLPROG = install ../$(BINDIR)/$(PROG) $(DESTDIR)$(INSTALLDIR)/$(PROG)

#
# Rename a .exe file if necessary

Sadly, nothing happened when I tried to submit it, but it's easy to keep up to date manually: just change "20130418" with "<latest version of ACPICA as reported on their site>" to get the newest version.

Hi,

I have neither the space for a new install (current install is full of my licensed software, passwords etc.) nor the upload bandwidth for supplying an image.

Don't bother with a DVD. I also never had success with DVDs in my previous attempts with older OS X versions. Instead, use a USB stick, as the guide outlines. Prepare it in an OS X virtual machine inside Windows.

When trying to install, with an unpatched BIOS & no SSDT, OS X will kernel panic (you have to make sure NullCPUPowerManagement.kext is loaded - which the USB installers take care of); with no correct DSDT or AppleIntelSNBGraphicsFB.kext not deleted, you won't see a desktop when trying to install. You can try and fix these things with a DVD, but it's probably going to take a lot of disks to get a working result - it's much easier to modify a USB.

These patches (not mine) are for the DH67*, but they may work with your board: https://github.com/R...67XX-DSDT-Patch