I have a MacBook Pro 4,1 Intel Core 2 Duo 2.4 GHz 2 Mb 800Mhz with Max OS X Version 10.5.8. Can I update the software to Mac OS X Snow Leopard V 10.6?

And also extend the 2Gb? The serial number of my MacBook Pro is W8808EMSYJX (Safari 5.0.6)

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    The MacBookPro4,1 (with at least 1GB of memory) can be upgraded to MacOS 10.6 (Snow Leopard). Once installed, it can be software updated to OS 10.6.8.

    Once OS 10.6.8 is installed, and there is at least 2GB of memory, the MacBook Pro can be further upgraded to OS 10.11 (El Capitan). To do so, use the App Store app that comes with OS 10.6.8 to download and install El Capitan.

    Since your MacBook Pro has a 2.4GHz processor, it was released early 2008. Officially the maximum memory it can use is 2GB, but some sources state that up to 6GB may be used. (If your MacBook Pro had a 2.5GHz processor, it was released late 2008. That model had an official maximum memory of 4GB, but some sources state that up to 6GB may be used.)

    Note: the versions of Safari that came with OS 10.5 through OS 10.8 may not work with some websites as those versions of Safari do not have the latest security protocols. Safari 9 is current, and is compatible with OS 10.9 through OS 10.11. If using an older version of Safari, and having difficulty accessing some secure sites, consider upgrading the OS to OS 10.11, or use a version of a third-party browser that has current security protocols and is compatible with OS 10.6 and later. One example of a third-party browser that meets those requirements: Firefox 45.

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