EFI firmware trick allows some 2008 MacBooks, MacBook Pros to address 8GB of RAM

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Date: Monday, March 7th, 2011, 04:46
Category: MacBook Pro, News

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Sometimes these things catch you by surprise in nifty ways.

Per the Apple Core, the cool cats at Other World Computing took another look at the memory limits in some of Apple’s late 2008 Core 2 Duo MacBook and MacBook Pros. Its testing found that a specific blend of updated firmware, Boot ROM and OS versions will let the notebooks handle a 8GB RAM upgrade.

According to a recent entry in the company blog, the tip says that machines running the latest update to Snow Leopard can address 8GB rather than the previous 6GB limit. It all depends on which version of the EFI Firmware Update and Boot ROM is installed.

The practical upshot of all this is that if you installed the EFI Update when it first came out, like we did, you would have gotten the old code, which meant your computer would only address 6GB properly. Those who didn’t upgrade until after Apple changed the updater got the newer firmware, which allowed proper addressing of 8GB.

Upon manually installing the “updated” version of the EFI Firmware in various test machines, the notebooks were able to address 8GB normally, without any crashing or slowdowns.

Users may have to download updated Boot ROMs, make sure they are running OS X Snow Leopard v10.6.6. According to the blog post, the machine must run the Mac OS X 10.6.6 software.

Apple includes SSD Trim support for 2011 MacBook Pro notebooks under Mac OS X 10.6.6

Posted by:
Date: Monday, March 7th, 2011, 03:35
Category: MacBook Pro, News

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The future is solid state hard drives.

Which isn’t bad, as they’re pretty nifty.

Per AppleInsider, the 2011 MacBook Pro models are shipping with Mac OS X 10.6.6 (build 10J3210), which supplies TRIM support for bundled Apple Solid State Drives, enabling extended performance of the fast new devices via background maintenance.

The change comes a bit ahead of schedule as it had been previously reported that Mac OS X 10.7 Lion would incorporate support for the TRIM command, which helps the operating system coordinate the maintenance of unused memory cells on the new SSD devices, preserving long term performance.

While the new notebooks appear to run the same Mac OS X Snow Leopard 10.6.6 version, the newer build (10J3210 versus 10J567, the newest build of Mac OS X 10.6.6 available for download from Software Update by other Macs) includes and automatically activates TRIM Support, as noted in System Profiler.

Apple will likely roll out support for the new feature in an upcoming new build of Snow Leopard. The feature reportedly only supports Apple-bundled SSD volumes, but this may change as well.

Stay tuned for additional changes as they become available and if you have any feedback as to your new 2011, Thunderbolt-equipped MacBook Pro, please let us know what you think in the comments.