Shop by RAM (Memory)
RAM (random access memory) is the place in a computing device where the operating system (OS), application programs and data in current use are kept so they can be quickly reached by the device's processor. RAM is much faster to read from and write to than other kinds of storage in a computer, such as a hard disk drive (HDD), solid-state drive (SSD) or optical drive. Data remains in RAM as long as the computer is running. When the computer is turned off, RAM loses its data. When the computer is turned on again, the OS and other files are once again loaded into RAM, usually from an HDD or SSD.
You can compare RAM to a person's short-term memory and a hard disk to long-term memory. Short-term memory focuses on the work at hand, but can only keep so many facts in view at one time. If short-term memory fills up, your brain is sometimes able to refresh it from facts stored in long-term memory. A computer also works this way. If RAM fills up, the processor needs to continually go to the hard disk to overlay old data in RAM with new, slowing the computer's operation. Unlike a hard disk, which can become completely full of data and unable to accept any more, RAM never runs out of memory, but the combination of RAM and storage memory can be completely used up.
You can find the compatible RAM to your machine by it's serial number, model identifier and part number. You can find the serial number and other identifiers for your Mac by following the instructions below:
In the About This Mac window
With most versions of macOS, you can find your computer's serial number and model information in the About This Mac window. Choose Apple menu > About This Mac. The window that appears lists your computer's model name—for example, MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)—and serial number. You can then use your serial number to check your service and support options or to find tech specs for your model. You can also use your computer's model identifier to get more information. In the About This Mac window, click System Report. In the System Information window that opens, find Model Identifier in the Hardware Overview section. Then use the identifier to locate your Mac below.
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