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The Early 2009 Mac Pro—also known as the Mac Pro 4,1—introduced Intel's Nehalem architecture to Apple's line of professional desktop computers in March 2009. The Mac Pro 5,1 used the same interior design but received further CPU updates in 2010 and 2012.

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== Background and Identification ==

The Mac Pro is a professional desktop computer designed by Apple and first introduced in 2006 as an Intel-based version of the preceding [link|https://en.wikipedia.org/wiki/Power_Mac_G5|Power Mac G5]. The Mac Pro was updated in 2009 to revision 4,1 with new CPUs based on Intel’s [link|https://en.wikipedia.org/wiki/Nehalem_(microarchitecture)|Nehalem architecture] and an internal redesign featuring a single removable tray for the processor(s) and memory. Further CPU updates in 2010 and 2012 (revision 5,1) used Intel’s [link|https://en.wikipedia.org/wiki/Westmere_(microarchitecture)|Westmere architecture]. Both revisions were sold with single or dual Intel Xeon processors granting up to 12 cores or consumer Intel Core i7 processors.

Many components in the Mac Pro can be easily upgraded if you’re interested in getting the most out of your machine. [link|http://blog.greggant.com/posts/2018/05/07/definitive-mac-pro-upgrade-guide.html|This awesome guide] by Greg Gant details the compatibility of just about every upgrade you can achieve for Mac Pros from 2006-2012. The firmware on the 2009 Mac Pro 4,1 can also be updated so that it can use any of the CPUs from the Mac Pro 5,1.

Both the Mac Pro 4,1 and 5,1 support ECC memory, and some models of the 5,1 were shipped with 1333 MHz memory instead of the base 1066 MHz. Depending on the CPU(s) inside, the 4,1 and 5,1 Mac Pros can accept up to 64 GB or 128 GB of memory. Since the Mac Pro uses PCIe slots, you can update the GPU to a modern card as long as your operating system has the correct drivers.

The latest officially supported release of Mac OS that will run on the Mac Pro 4,1 is 10.14 Mojave (as long as you have a Metal-capable graphics card). With the same GPU requirement, you can use the latest release of macOS on the Mac Pro 5,1 using Opencore Legacy Patcher. You can also use Linux or Windows 10 ([link|http://blog.greggant.com/posts/2018/05/07/definitive-mac-pro-upgrade-guide.html#windows10|guide]) on the Mac Pro 4,1 and 5,1 if that’s more your style.

To identify your Mac Pro, find the serial number on the back panel just below the graphics card output. You can then use Apple’s [link|https://checkcoverage.apple.com/|serial number lookup webpage] to identify the model. Both the Mac Pro 4,1 and 5,1 share the model number A1289.

== Specifications ==

***Processor (depends on exact CPU)***

* Intel Xeon, dual Xeon, or Core i7
* 4 to 12 cores
* 2.4 GHz to 3.46 GHz

***Memory***

* 1066 MHz or 1333 MHz
* Up to 64 GB or 128 GB (only with dual Xeon)
* ECC (error correcting) DDR3
* Type: UDIMM

***Storage***

* SATA 2.0 (3 Gbit/s)
* 4 drive bays for 3.5-inch hard drives
** Can use 2.5-inch SSDs with an adapter bracket

***Connections***

* 5 USB 2.0 ports (two on front panel)
* 4 FireWire 800 ports (two on front panel)
* 2 gigabit Ethernet ports
* 3.5mm analog audio input and output
* TOSLINK audio input and output

***Wireless***

* 802.11a/b/g/n Wi-Fi
* Bluetooth 2.1+EDR

***Audio***

* Internal mono speaker

***Optical drive***

* 2 Optical Drive Bays supporting 2x 18x CD and DVD drives

== Additional Information ==

[link|https://en.wikipedia.org/wiki/Mac_Pro#1st_generation_(Tower)|Mac Pro on Wikipedia]

[link|https://everymac.com/systems/apple/mac_pro/index-macpro.html|Mac Pro specifications (all models) on EveryMac]

[link|https://support.apple.com/kb/SP506|Mac Pro Early 2009 specifications on Apple Support]

[link|https://support.apple.com/kb/SP589|Mac Pro Mid 2010 specification on Apple Support]

[link|https://support.apple.com/kb/SP652|Mac Pro Mid 2012 specifications on Apple Support]

[link|http://blog.greggant.com/posts/2018/05/07/definitive-mac-pro-upgrade-guide.html|Mac Pro upgrade guide by Greg Gant]

[link|https://www.apple.com/newsroom/2009/03/03Apple-Introduces-New-Mac-Pro/|Apple Mac Pro press release]

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Mac-Pro-2009-Tech-Guide.pdf

Macpro 8x

Macpro Mid2010

Tsonga

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