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When I boot with Clover, I see in HWMonitor 6.16.1372 that CPU reaches x32 multiplier and 3,17 GHz (on one core, because it shows multiplier and speed by core on Clover) - even though in MSRDumper there was only one occurence of CoreMulti(32) after running CPUTest for about 10 minutes. Tried to install HWMonitor with FakeSMC on Chameleon boot, but it only shows CPU frequency and multiplier for whole package (I guess), and it still doesn't reach x32 multiplier.

It seems to make no difference, or I'm doing something wrong. Guide from the thread is a little chaotic. When I try to boot with provided bootpack, it's stuck on the Apple logo for ever. But when I change config.plist to the one for E6420, it does boot altough the resolution is wrong - I can't see anything but gray lines. This bootpack messed a little in my head - I don't know why all stuff is in OEM folder. I also tried to change DSDT to the one from my Chameleon bootpack, but it failed with graphics artifacts. EDIT: I gave up configuring it with Clover, it seems that my laptop is better supported by Chameleon. I installed Mavericks with provided bootpack again, but this time, I removed IONetworkingFamily.kext and put BCM5722D.kext instead - network is operating alright (sometimes it says that the Ethernet cable is disconnected, even when it actually is, and the MAC address of card is 00:00... - not sure if it can be the issue of BCM kext, or lack of some plugins from IONF?), I can enter Network and Power Management prefpanes. I got suspicious about the IONF kext after installing Clover with Chameleon bootpack - it broke network as well, that's why I came back to Chameleon. It shows battery percentage, sound works with volume adjustment - so I'm happy with it. I also modified IOBluetoothFamily.kext by adding device with my Vendor and Product IDs to BroadcomBluetoothHostControllerUSBTransport.kext plugin's Info.plist, to allow switching off Bluetooth, as mentioned here and here (sorry if it's forbidden to link other sites). Here is my modified IOBluetoothFamily.kext (you can see there is a device added called "Dell DW375 Bluetooth Module" with 16700:33159): IOBluetoothFamily.kext.zip The last thing (for now) that bothers me is SpeedStep and Turbo Boost (especially the second one) - it looks that Turbo Boost works, but it reaches only 2,97 GHz with x30 multiplier, when it should reach 3,2 GHz with x32 multiplier. If I do remember correctly, it showed when it was running Clover (I check it with HWMonitor 6.0.1042 - it doesn't work after updating, but I don't think it might be the issue). I tried to generate SSDT with ssdtPRGen.sh script by PikerAlpha, but it didn't make difference. Anyway, the SSDT from bootpack seems to have correct maximum frequency set - I checked it with: ioreg -lw0 | grep PerformanceStateArray running in Terminal, and it returned "800C", which means 3 200 MHz. I use CPUTest to stress the CPU, but maybe it is not sufficient to reach maximum state? Do you have any ideas what else I can check? EDIT 2: Checked SpeedStep by loading MSRDumper.kext; it looks like the 32 P-state has been reached: 28.09.2015 14:20:08,000 kernel[0] MSRDumper PStatesReached: 8 12 16 21 25 30 32 But there is only 1 occurrence of actual multiplier: 28.09.2015 14:20:08,000 kernel[0] MSRDumper CoreMulti(32) while there are 718 occurrences of CoreMulti(30) and hundreds of others. It looks that the maximum frequency is very rarely used - still don't know if it's because I use "too weak" stress tester? Or maybe there's something with smbios.plist?

Thanks @Jake Lo for the guide. I managed to install Mavericks, by following it - of course changing all Yosemite references to Mavericks ones. I also kept DSDT & SSDT from Chameleon bootpack - copied them to /Clover/ACPI/patched in E6420Yosemite Colver bootpack from the guide, before install. This are the results of installing it with all kexts from Chameleon bootpack: - no sound, - ethernet: seen after a few restarts (probably after installing BCM5722D), - no battery percentage (battery empty showed after adding ACPIBatteryManager kext), - no sleep (probably because of VoodooSDXC or, what I found later, because of the fact that I didn't copy Clover folder from bootpack to /EFI/EFI/Clover), I have not tested the rest. After installing Mavericks with the kexts you mentioned, results were as follows: - no sound - works after installing VoodooHDA kext, but without volume level control - tried to install AppleHDA from here, but without success, - battery empty, - no ethernet (appeared after installing BCM5722D), - no sleep (cannot wake) - sleep works after installing Clover on HDD and copying bootpack's stuff to /EFI/EFI/Clover, - graphics artifacts and glitches (disappeared after installing Clover on HDD and copying stuff to EFI). Not tested the rest as well. I assume that there are some issues, because the bootpack is for Yosemite (but it contains 10.9 kexts as well) and for other laptop model - maybe there are some other settings in config.plist? And, as said in guide, there is no known kext for battery percentage - but it worked in Chameleon - can it be the Clover "issue"?

Again, back after some time Thanks for the tip @Jake Lo, but unfortunately neither myFix nor installing Extra again didn't help. It looks that the problem is even before installing OS X - there's no Wi-Fi in installer. Or maybe I'm doing something wrong when I'm preparing USB stick... But now I wonder if making Clover boot could fix that? That led me to the next question - will kexts from Chameleon bootpack work with Clover? Is it even possible to make Clover boot with this laptop?

Thank you for the tip @Herve, about DSDT patch for card reader. I tried to manage it, but I failed for now. I have to look more closely on this and try again. But, what's more important for me now, are network and power saving problems - when I create installer with Extra from @Jake Lo (#5), there's no Wi-Fi right after booting into installer, and no network at all after complete install. Just to note, installer ends with "Installation failed" after long pause just before finish (when there's a "1 minute/less than minute remaining"), and after reboot, it continues to configure (creating account, registering etc.). But there's no network and power saving. Do you have an idea, what else to check?

I didn't know that it is SO simple to remove the pane, thanks. Also thanks for the tip about brightness. After installing your bootpack, I discovered that card reader stopped working - but I followed guide from your sig (SD Card Reader), by adding string with my card reader's IDs: 1217,8321 (there was 1217,8221 in info.plist) - after rebuilding caches and reboot, card reader works again. But, there is a new problem - I've installed an update from AppStore, not sure what it was - something with iTunes I remember - and after reboot, the network has gone. There were no WiFi nor Ethernet. I couldn't connect throught Bluetooth PAN either. When I tried to enter "Network" in System Preferences, it was greyed out with rainbow wheel on it. I thought that it could broke after the update and because I was installing your bootpack on previously EDP-ed OS. So, I created new boot stick with your bootpack as Extra, and installed fresh OS. It was strange from the beggining, that there was no WiFi available in the installer - it was, when I was installing with previous bootpack (should work OOB). After successful install, there is no network at all - WiFi, Ethernet, FireWire nor Bluetooth PAN. When I launch Network in System Prefs, it says that "There is no services in this location". When I try to add them by clicking "+" in the left pane, it hangs with rainbow wheel again. The "Energy saving" System Pref doesn't work as well, hangs just after clicking it. Everything else seems to work as it should. Don't know if it could be the tip, but there's no "15-inch, Late 2011" note inside About Mac - maybe it has something with SMBios' product name?

I'm using VoodooHDA. I've used bootpack that you provided, and wow! Sound level is adjustable, sleep works perfectly, HDMI and - VGA - as well Thanks for the bootpack! And, by the way, it even "answered" my next question, about booting screen - from EDP it was like 4:3 OSXLatitude logo on the left of the screen, now it's proper Apple So, I've launched MyHack from already installed OS X, chosen to install Extra and pointed to Extra-E5520 was in the zip that you upladed - not sure if it was your intention, because of below I'm not quite sure about "Skip the EDP stuff" part, because it was already done before, and I didn't install OS from scratch - but I didn't do anything with EDP after installing Extra from your bootpack. Here, I have a question - if I would create installer with this bootpack, will EDP stuff be needed? And I'm not quite sure if I removed VoodooHDA and AppleHDADisabler kexts properly - I've just deleted them from \E\E & everywhere, where they were, after that I've run MyFix (full). But even after that, the VoodooHDA PrefPane in System Preferences was shown, I had to hide it by customizing System Preferences. So I'm not sure if it's completely removed. Looks like there's only one thing left - no OSD when changing brightness with Dell's fn+Up or Down. I know it's more like cosmetics, but would be nice if it's possible to make it work. If no, I will have to deal with it Still, many thanks for current effort!

Hello again, had a very busy month... I hope you're still there Thanks for your replies, and thanks @Jake Lo for DSDT, I've been able to reach installer finally. I've managed to install Mavericks 10.9.5, after a few times that installer crashed with the "OS X Installer couldn't install", I've read that I had to format my HDD with GPT, and create Installer without MBR Patch in MyHack. After install, I tried to fine-tune it with EDP, and, surprisingly, one of two CPU options was my i5-2520M - surprisingly for me, because all other of E5520's that I found was with i3 (I guess it's some budget version, with lack of HD res and camera). Unfortunately, the DSDT with EDPv6 broke my res again - it's meant for HD. So, next time (after new install), when I was running EDP, I've chosen to disable EDP's DSDT, and enable my own - the one from @Jake Lo, that I used with installer. After that, OS X booted, and many things were better, than before, but not perfect. In the meantime, I changed WLAN card to DW1510, which worked flawlessy out-of-box. So now, I have working: - sound (but the dedicated sound buttons doesn't work - they show OSD, but sound level is the same nevertheless how many "squares" are on it, even after mute); - battery; - Bluetooth and WiFi (they work OOB); - Ethernet; - touchpad (not quite sure if multitouch works, because when I "full-screened" for example Safari, it doesn't switched with three-fingers swipe - but maybe I'm doing something wrong); - trackpad; - SD card reader; - Dell fn buttons (but I'm not sure if they work how they should, i.e. brighness changes, but the OSD doesn't show, and it looks like it changes apart from OS', because OS changes it more "gently"); - graphics - but not in the way that I think it should work (why - below). I'm not sure about ExpressCard slot, I don't have any EC card, but I believe it works (because SD reader works). What's not working, is: - sleep (altough it does sleep, but doesn't wake - after power up it's just black screen); - VGA and HDMI ports (even after forcing to detect monitors); - things, that I mentioned above, which are semi-functional in my opinion, but maybe that's the way they work. Also, when I was installing EDPv6, error "Can't use system extension" with "AppleACPIEC.kext" showed up. I wonder, if this error, and that I used different DSDT than the EDP's one, may be the cause of my problems? Is there any way to run (by editing something) the DSDT from EDP with my resolution?

First, Hello to everyone on this forums, it's great site! I have a Dell Latitude E5520 with following config: - Intel Core i5-2520M, 2,5 GHz CPU (replaced from E5420, originally was i3); - Intel Cougar Point HM65, Intel Sandy Bridge chipset; - 4 GB DDR3 1333 MHz RAM; - Intel HD 3000 1366x768 graphics. I'm trying to install OS X Mavericks from .app file. I've downloaded 10.9 Bootpack from OSXLatitude's EDP and tried to create bootable USB with MyHack, following manual here. Don't know if that does matter, but when I'm creating installer, when I reach step 10, MyHack doesn't ask me about Extra folder - I have to do this myself after "All processes completed". So, after that, with Extra from 10.9 Bootpack, my installer stops on striped screen, like in this thread. No matter, if I try with -GraphicsEnabler, -PciRoot, Verbose mode, Safe mode. It's always the same. When I tried to run installer with General Extra from MyHack, it reaches installer, but after a while it crashes with Apple Installer Crash Log. I've tried to install with Extra from here, here and here, always with no luck. Maybe the CPU and graphics inside it are wrong, cause of replacement? Any help and suggestions will be appreciated. Thanks in advance for your time!