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iMac 27" (Mid 2011)

A1312 · iMac12,2 · 2011–2012 · all-in-one

Specifications

Cpu: Intel Core i5-2500S 2.7 GHz / i5 3.1 GHz quad-core (i7-2600 3.4 GHz BTO)
Gpu: AMD Radeon HD 6770M 512 MB (HD 6970M 1–2 GB BTO), MXM module
Ram: max: 32 GB (4×8 GB SO-DIMM; 16 GB official) · base: 4 GB DDR3-1333
Ports: USB 2.0 ×4 · Thunderbolt ×2 · FireWire 800 · SDXC card slot · Gigabit Ethernet
Display: 27" 2560×1440 IPS LCD
Storage: base: 1 TB HDD · options: 2 TB HDD (BTO) · 256 GB SSD (BTO) · 256 GB SSD + HDD (BTO)
Os Support: latest: macOS 10.13.6 High Sierra · shipped: Mac OS X 10.6.6 Snow Leopard
Release Price: $1,699

Upgrade paths

RAM

32 GB (4×8 GB DDR3-1333 SO-DIMM) · Four SO-DIMM slots behind the access door on the bottom edge, an Apple-sanctioned user upgrade.

~$60

EASY

storage

3.5" SATA HDD or 2.5" SSD; spare internal SATA III port allows adding a second SSD · Magnetic glass panel lifts off with suction cups. Apple HDDs use custom firmware temperature sensing, replacements need an OWC in-line sensor or fan-control software.

MODERATE

GPU

MXM module; documented community swaps to newer MXM cards (e.g. NVIDIA Quadro K-series) with patched firmware · Popular fix for the failure-prone Radeon HD 6970M; advanced mod territory.

HARD