Apple MacBook “Core M” 1.3 12″ 2015 Specs

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BTO/CTO – MacBook8,1 – A1534

About this MacBook

This a1534 device is a BTO/CTO device that is nearly identical to MF855LL/A and MF865LL/A. We have listed this device separately as it has been configured with an upgraded processor when compared to the base MacBook model. This has been done to make it easier to catalog as well as easier to read.

The dawn of 2015 saw the re-establishment of the MacBook Family from the previous 2010 MacBook models. The MacBook had been fully redesigned and bore the only resemblance in name to the last one produced in 2010 and discontinued in 2012.

This came with a lot of focus on not only powerful internal capacity but lighter and thinner models, the MacBook 12 Inch computer with a 1.3 GHz Intel Core M processor (M-5Y71) was and still is a device that remains a favorite today. The connectivity options for external devices to the MacBook had now been cut down drastically to only 2 – USB-C ports as well as a headphone jack.

The flexibility to upgrade died in this MacBook – The RAM and onboard internal storage were fixed without the option of upgrading. The 8 GB of RAM and 256/512 GB of onboard PCIe-based flash storage was impossible to upgrade and due to this the thickness was drastically reduced to between 0.14 – 0.52 inches and the weight was more than halved (2.03 pounds) when compared to the lightest versions from the 2006 – 2010 periods. This MacBook came with macOS 10.10.2 and could be updated to macOS 11.

1.3 GHZCore M

8 GB

256, 512 GB SSD

10 Hours

Storage

The storage was equally revamped with 256/512 GB of PCIe-based flash storage soldered to the Mother Board with no hope of a future upgrade. The storage speed of the hard drive is estimated between 451.7 – 738.2 MB/s.

Screen Size and Resolution

This MacBook came with a 12 inch screen that incorporated an incredible upgrade in its native resolution from the previous 1280×820 to 2304×1440 and a new TFT LED-Backlit active-matrix “Retina” display (for millions of colors to be displayed clearly as the pixel density is very high – 226 pixels per inch ensuring that individual pixels are not easily detectable at a normal viewing distance) with IPS technology it also supports other resolutions such as 1440×900, 1280×800 and 1024×640.

Processor& Graphics Processing Unit (GPU)

The preinstalled operating system on this device was MacOS X 10.10.2 (14C2061). Apple also made a return to Intel for the provision of a graphics processor with the Intel Integrated HD Graphics 5300 graphics processor replacing the NVIDIA GeForce that was used in the last 2010 model. This processor shared the memory of the onboard 8 GB 1600 MHz LPDDR3 SDRAM.

Memory & Architecture

This devicewas powered with a 4 MB Level 3 cache and 8 GB of onboard 1600 MHz LPDDR3 SDRAM that cannot be upgraded, unlike the previous versions. This was centered on a 64-Bit architecture.

Battery Life

The MacBook was further improvedby a 39.7-watt-hour lithium polymer battery that guarantees 10 hours of battery life as a result of their innovative new-terraced design packing of battery cells.

Upgradability

The flexibility to upgradedied in this MacBook – The RAM and onboard internal storage were fixed without the option of upgrading. The 8 GB of RAM and 256/512 GB of onboard PCIe-based flash storage was impossible to upgrade and due to this the thickness was drastically reduced to between 0.14 – 0.52 inches and the weight was more than halved (2.03 pounds) when compared to the lightest versions from the 2006 – 2010 periods.

Inclusive Features

The MacBook Pro includes the following features and ports:

Standard AirPort (802.11ac)
Bluetooth 4.0 that provides optimal low energy usage for quick PAN (Personal Area Network) connections and transfers and is also backwards compatible with lower bluetooth devices
1 USB-C port for connectivity
480p FaceTime Webcam
Optical digital audio in/out for connecting external audio equipment like headphones and microphones
By attaching VGA or HDMI adapters to the single USB-C port you can assess 2nd display support resolution properties of up to 3840×2160.
Full size backlit keyboard
Force Touch TrackPad which lets you Force Click by pressing on the trackpad and then applying more pressure, it is able to differentiate various functions as a result of how much pressure is applied.

Introduced:March 9, 2015		Discontinued:April 19, 2016
Screen Size and Resolution		Memory
Screen Size	12inches	Level 1 Cache	32k/32k x2
Resolution	2304×1440	Level 2/Level 3 Cache	256k x2, 4MB on chip
Processor		RAM Type	LPDDR3 SDRAM
Processors	1 (2 Cores)	Min. RAM Speed	1600 MHz
Architecture	64-Bit	Standard RAM	8 GB
Speed	1.3 GHz	Maximum RAM	8 GB
Type	Core M (M-5Y71)	RAM Slots	None
Processor Upgrade	Soldered	Motherboard RAM	8GB
FPU	Integrated	Graphics
System Bus Speed	OPI	Video Card	HD Graphics 5300
Cache Bus Speed	1.1 GHz (Built-in)	VRAM Type	Integrated
ROM/Firmware	EFI	Standard VRAM	1.5 GB
EFI Architecture	64-Bit	Maximum VRAM	1.5 GB
Storage		Inclusive Features and Ports
Standard Storage	256, 512 GB SSD	Standard Optical Drive	None
Storage Speed	451.7 –738.2 MB/s	Standard Ethernet	10/100/1000Base-T
Storage Dimensions	Soldered	Standard Modem	None
Storage Interface	Onboard (PCIe 2.0 x 4)	Standard Air Port	802.11ac
Battery		Standard Bluetooth	4.0
Type	39.7 W h Li-Poly	USB Port (C)	1
Battery Life	9 – 10 hours	FireWire 400	None
Description		Keyboard	Full-size
Case Type	Notebook	Inclusive Input	Trackpad (Force Touch)
Form Factor	MacBook Retina 12”	S-Video Output	None
Apple Order No	BTO/CTO	Microphone	1
Apple Subfamily	Early 2015	Headphone	1
Apple Model Number	A1534 (EMC 2746)	Sound Out	1
Model ID	MacBook 8.1	Power Adapter	1

Identifier reference: CTOMF855LL/A, A1534, EMC 2746, BTO/CTO MacBook8,1 A1534. Use these together because one Apple identifier can sometimes cover multiple configurations.

Last reviewed by Techable: August 14, 2025Identifiers checked: order number, A-number, EMC, and model identifier when available.

Model summary

This MacBook at a glance

Family: MacBook
Order Number: CTOMF855LL/A
Model Number: A1534
EMC: 2746
Model ID: BTO/CTO MacBook8,1 A1534
Year: 2022

Use the order number, A-number, EMC, and model identifier together when comparing, buying, or selling this device.

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Next steps

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Common questions

Is CTOMF855LL/A the same as A1534?

Not exactly. CTOMF855LL/A usually points to a specific retail configuration, while A1534 identifies the broader Apple hardware family. Always check the EMC and model identifier too.

What MacBook is model A1534?

A1534 is the Apple A-number shown for this MacBook family. Use the order number, EMC, and model identifier on this page to narrow the exact configuration.

What does EMC 2746 mean?

The EMC number is another Apple hardware identifier. It helps separate closely related models that may share a similar name, year, or A-number.

Can the RAM or SSD be upgraded?

Check the spec table for the exact configuration. Many newer Apple Silicon Macs have memory and storage integrated into the board, so RAM and SSD upgrades are often not practical after purchase.

What macOS versions work with this model?

Use the model identifier, release year, and processor family from the spec table when checking macOS compatibility. Compatibility can change as Apple releases new macOS versions.

Is this MacBook still worth buying used?

It can be, depending on price, battery health, memory, storage, and condition. Compare this exact order number and model identifier against similar Techable listings before buying.

How much is this MacBook worth?

Value depends on RAM, storage, battery health, cosmetic condition, accessories, and market demand. Use the SellMac path on this page for a quote or use the identifiers here when comparing resale prices.

What should I search if this page is not the exact configuration?

Search the order number first when available, then compare the A-number, EMC, model identifier, year, chip, RAM, and storage. The same A-number can cover more than one configuration.

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