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What are all the differences between the 'Mid-2011' Aluminum 'Unibody' Mac mini models? Which is best for my needs?

Please note that the 'Mid-2011' Mac mini models have been discontinued. However, this Q&A is up-to-date and can be quite helpful for anyone buying or selling one of these systems on the used market. With even a detailed physical inspection of the small, aluminum 'Mid-2011' Mac mini models -- the stock configurations of which are the, and -- one would not find any obvious differences between them. However, there are important differences in hardware as well as software and intended use that are well worth evaluating.

Latest version of os x for mac. Photo Credit: Apple, Inc. External & Connectivity Differences (Or, the Lack Thereof) All three of these configurations use tiny 'cuboid' aluminum cases -- just 7.7 inches across and deep and a miniscule 1.4 inches tall -- that have a 'spin off' black plastic base on the bottom that can be removed quickly to access the. As is quickly apparent from the above image, none have an internal optical drive (although Apple offers an external one for US$79).

Photo Credit: Apple, Inc. All three systems have identical connectivity, too.

Connectivity includes 802.11a/b/g/n Wi-Fi (as a minor point of minutia Apple stopped branding the wireless internet capabilities as 'AirPort Extreme' with these models, although the technology is the same), Bluetooth 4.0, four USB 2.0 ports, a single Firewire '800' port, combined 'audio line in (digital/analog)' and combined 'audio line out/headphone (digital/analog)' minijacks, a 10/100/1000Base-T Gigabit Ethernet port, and an SDXC-capable SD card slot. All support IR for a remote, too. For simultaneous support of dual displays, and more, the 'Mid-2011' Mac mini models have both an HDMI port and a new ' port.

Thunderbolt is backwards compatible with Mini DisplayPort and likewise supports an external display at 2560x1600 and passes an audio signal as well. Thunderbolt also supports other peripherals that use the Thunderbolt standard which provides up to 10 Gbps of bandwidth in both directions. Identification Differences Externally, the 'Mid-2011' Mac mini line shares its single with other Mac mini models, and as a result, it is not convenient to use for identification. The three stock models -- as well as the ' option -- do share a unique -- visible upon removing the bottom 'spin off' panel (on the righthand side with the ports facing you) -- and EveryMac.com methodically has documented this detail accordingly. In software, the entry-level model, the mid-level model and the model can be identified by of, and, respectively. The option -- which has the same graphics as the mid-level model -- shares the identifier as well. EveryMac.com's feature -- as well as the -- also can identify the 'Mid-2011' Mac mini models by their Serial Numbers.

Internal Differences Although there are some similarities internally -- all use Intel 'Sandy Bridge' processors of differing types and speeds with a 5 GT/s 'Direct Media Interface' in lieu of the 'traditional' system bus, all support 1333 MHz PC3-10600 DDR3 SO-DIMMs, and all support two 6 Gb/s Serial ATA hard drives, for example -- there are major differences as well. The most notable internal difference is that the mid-level model has dedicated graphics -- an AMD Radeon HD 6630M graphics processor with 256 MB of dedicated GDDR5 memory -- which results in a substantial improvement in graphics performance. The entry-level and server models, by contrast, only have integrated graphics, specifically an Intel HD Graphics 3000 video processor, that shares memory with the system. It also is quite notable that the server configuration has a quad core processor rather than dual core processors like the other models. The server model also shipped with dual hard drives and Lion Server pre-installed. Comparison Chart Other differences include pre-installed memory and storage, and these are summarized below along with processor, identifier, and price differences: 2.3 2.5 2.0 (Server) Processor Speed: 2.3 GHz 2.5 GHz* 2.0 GHz Processor Type: Core i5 (2415M) Core i5 (2520M)* Core i7 (2635QM) Processor Cores: 2 2 4 L3 Cache: 3 MB 3 MB 6 MB Std.