Macbook Pro Mid 2012 Firmware Downgrade

Question

Level 1

9 points

Macbook Pro Mid 2012 Firmware Downgrade

Friends Macbook Pro Mid 2012 model evo to my computer upgraded with 840 samsung 6 months ago, and I was using it without any trouble. But in the last one month I got on my computer machine kernel cache error. With the installation and opening of the original disc, but SSDs doing was making trouble. I gave the service SSD y not change no matter what problems they have learned and change. Carbon Copy Cloner now and again with mac dupper supper time machine backup or recovery took my board if I did not open and the kernel fails again on cahce. Trim off mode, albeit not have them, even if I've tried everything. In the end, many SSDs ef firmware samsung site about a problem with the data transfer rate is found. Now I guess my goal to downgrade version 1.6 of EFI y How can I do my job, you'll see that information transaxle. Downstairs you can see information about my computer.

Model Adı: MacBook Pro

Model Tanıtıcısı: MacBookPro9,2

İşlemci Adı: Intel Core i5

İşlemci Hızı: 2,5 GHz

İşlemci Sayısı: 1

Toplam Çekirdek Sayısı: 2

L2 Önbellek (her bir çekirdek için): 256 KB

L3 Önbellek: 3 MB

Bellek: 10 GB

Boot ROM Sürümü: MBP91.00D3.B08

SMC Sürümü (sistem): 2.2f44

Seri Numarası (sistem): C0*****TY3

Donanım UUID'si: BCE9C44A-96BE-5140-AA5A-91AEEE244573

Ani Hareket Algılayıcısı:

Durum: Etkin

Posted on Jun 28, 2014 12:53 PM

Reply

Answer 1

Jun 28, 2014 1:00 PM in response to aenistekin

You should not publish a machine serial number in a public forum, not a good security practice.

You cannot downgrade a firmware version, whether it came on the machine or is from an upgrade. There isn't a path back down on firmware.

Reply

Answer 2

Jun 28, 2014 1:02 PM in response to aenistekin

See EFI and SMC firmware updates for Intel-based Macs for the available firmware versions.

Reply

Answer 3

Loner T

Level 9

59,536 points

Jun 28, 2014 1:07 PM in response to aenistekin

It may have nothing to do with the firmware of your machine. What is the Kernel cache error? Bootcamp is one option to upgrade firmware of the SSD.

The Samsung SSDs come with Magician, which should allow you test the performance and integrity of the SSD. If it is a HW issue, you should be able to get a replacement. Samsung originally had offered a 5-year warranty on the 840 Pro SSDs.

The other option is a down-loadable .iso from Samsung Support website.

Reply