panic(cpu 0 caller 0xffffff800064ba7b): "Unable to find driver for this platform: \"ACPI\"

Hello Lieu Ann Yow,

I had the same mac like u, with OS X 10.6.8, as basic IOS.

When i got some troubles after installed lion , and some updates, am going to reinstall the lion through the option disk, when the mac start up. ( hold "alt" when rebooting)

I think, the easy way, is download a new copy of lion through the mac app store; to install the good version of 10.7.4 of lion, then I think all should be fine with your app.

PS: The solution that you told, is not mine, I found it here.

PS2: You need to download directly lion from app store with a good wifi signal, and any credentials (ID and PWD) which had been used to buy lion, before.

Hello Gkadjo,

Will do as you recommended. However, I have two questions which hope you can advice

a) Do the applications work fine after you reinstall the OS Lion?

b) When I installed the OS Lion previously, I purchased it online. If I am going to download a new copy of Lion through Apps Store, do I have to purchase again (assuming I am using the same Apple ID & PWD)?

Hi Lieu Ann Yow,

a) Do the applications work fine after you reinstall the OS Lion?

>> YES; lion, shall reinstall only the files system, so all app will work fine

b) When I installed the OS Lion previously, I purchased it online. If I am going to download a new copy of Lion through Apps Store, do I have to purchase again (assuming I am using the same Apple ID & PWD)?

>> NO, Os lion will be dowloaded for free, if you have any apple ID which bought lion

Hi Gkadjo,

Have to trouble you again. Currently I am on OS 10.6.8 after reinstalling from recovery CD following the crash cauesd by the thunderbolt update.

Based on your advice, I should go to Apple Apps Store to download the OS Lion 10.7.4 in order for my applications to work again. However, I discovered that the pre-requisite to install OS Lion 10.7.4 is the current systerm OS must be running Lion 10.7, in which my current system doesn't meet the requirement.

I tried to search on the web for OS Lion 10.7 which I think is the only version I can upgrade my current OS 10.6.8 but couldn't find any.

Kindly advice

Anyone can advice where I can download Mac OS Lion 10.7?

I have this exact problem, but when I press "Command" + "r" nothing happens. But when I press shift at startup the "Unable to find driver for this platform" screen takes longer to pop up. But it still pop ups. Though when I press the option key at startup, the Macintosh HD icon pops up, but when I press it it again returns to the "Unable to find driver for this platform" screen.

Any other suggestions to solve this issue?

I have a 2010 MacBook Pro.

Same problem here with my iMac mid 2011, im trying to reinstall de OS (cmd + r) but the disks are locked!

I took my Mac to the Apple store for them to check it out. And in order to fix this problem they had to replace the hard drive ($170)...

I tried the update via the terminal command and it failed every time that I did it. I ended up just going through the reinstall as it was mentioned earlier. That seemed to get it working at least to the point where I could function.

For the record I am using 10.8.2 and was trying to do the 10.8.3 combo update.

I hope this help

try boot to disk utility from boot up by press command + R, try to erase and recreate the disk

and install from disk utility

I had this same error /problem, and I initially thought it was a software problem from all the apple forums, but learned that in MY CASE it was in fact the hard drive cable, which was coming slightly loose upon moving the laptop... this happened after installing a new hard drive (memory upgrade). If you have this issue or continue having this issue, make sure that all your mounting screws are in your hard drive (especially after a hd replacement) and that your hard drive cable is not loose. Even if it becomes slightly loose upon moving, your computer will go back to a grey screen upon startup. A small amount of tape securing cable to hard drive seemed to fix the issue I was having (you must make sure there will be no loosening of the cable with movement, etc), but you may opt for a new hard drive cable. You can try saving any data on the drive, but then you must reinstall the hard drive and reinstall MacOS after using command +R and erasing the disk... same as before mentioned.

I tried Your method in the MAC OS X 10.8.2. Unfortunately, the installation ComboUpdate (10.8.2) - failure