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OVERVIEW
IntroducedAugust 2011
Model IdentifieriMac12,1
Model NumberA1311
EMC2496
Order NumberMC978LL/A
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ColorsSilver
Weight and Dimensions20.5 lbs., 17.75" H x 20.8" W x 7.42" D
PROCESSOR
ProcessorIntel Core i3 (2100)
Processor Speed3.1 GHz
Maximum Processor Speed
Architecture64-bit
Number of Cores2
Security ChipNo
Cache3 MB on-chip shared L3 cache
System BusIntel Direct Media Interface (DMI) at 2.5 GT/s
Logic board RepairNiwTech
STORAGE AND MEDIA
Storage250 GB (7200-rpm SATA)
Storage UpgradeNiwTech
Data RecoveryNiwTech
MediaSlot-loading 8x SuperDrive (DVD±R DL/DVD±RW/CD-RW)
PERIPHERALS
PeripheralsApple Keyboard with Numeric Keypad, Apple Mouse
Peripherals RepairsNiwTech
SOFTWARE
Original OSMac OS X 10.7 (11A511)
Maximum OSmacOS 10.13.6 (17G65)
OS installNiwTech
OS UpgradeNiwTech
OS DowngradeNiwTech
OS SupportNiwTech
AirDropSupported
Handoff
Power Nap
Unlock with Apple Watch
Hardware TestAHT 3A215
FIRMWARE
FirmwareIntel Extensible Firmware Interface (EFI)
MEMORY
Built-in MemoryNone
Maximum Memory16 GB
Memory Slots4 - 204-pin PC3-10600 (1333 MHz) DDR3 SO-DIMM
Memory UpgradeNiwTech
Memory Upgrade InstructionsHow to remove or install memory
Interleaving SupportYes
DISPLAY
Built-in Display21.5-inch (viewable) LED-backlit glossy widescreen TFT LCD
Display Glass
Brightness
Pixel Density
Color Gamut
Resolutions1920 by 1080 pixels
Display ReplacementNiwTech
GRAPHICS
Graphics CardAMD Radeon HD 6750M
Graphics Card ReplacementNiwTech
Graphics Memory256 MB GDDR5
Display Connection1 - Mini DisplayPort
Display ModesDual display extended, video mirroring, and AirPlay Mirroring
External ResolutionUp to 2560 by 1600 pixels
CAMERA
CameraBuilt-in FaceTime HD
CONNECTIONS
Wi-Fi802.11n
BluetoothBluetooth 4.0
Ethernet10/100/1000BASE-T (RJ-45)
ModemNone
USB4 - 480 MBit/s
FireWire1 - 800 MBit/s
Thunderbolt
Display1 - Mini DisplayPort
InfraredNone
Audio In1 - 3.5-mm analog/optical combo input jack, Built-in microphone
Audio Out1 - 3.5-mm analog/optical combo output jack, 2 - internal 17-watt amplifiers, Built-in speakers
Security Slot1 - Kensington cable lock
EXPANSION
Slots1 - Secure Digital (SDXC)
BaysNone
Hard Drive Interface2 - 6.0 Gbps Serial ATA (SATA)
Optical Drive Interface3.0 Gbps Serial ATA (SATA)
SENSORS
Liquid SensorNon
POWER
Line Voltage100-240V AC
Power Supply ReplacementNiwTech
ENVIRONMENTAL
Acoustical Performance18 dBA at idle
Power Consumption80 W (Idle) 101 (CPU Max)
ENERGY STARMeets ENERGY STAR 5.2 requirements
EPEATGold
NiwTechwww.niwtech.com