![]() ![]() When the data is needed again, it’s transferred back to RAM. When your physical memory fills up, macOS automatically “pages out” data that isn’t actively being used, storing it on your Mac’s internal drive. Every 64-bit process is given about 18 exabytes-that’s 18 billion gigabytes-of space it can work with.Īpplications are free to use as much memory as they want within these limitations. ![]() For example, even if you have a Mac with 8 GB of RAM, every 32-bit process on your Mac is given 4 GB of available address space it can use. While your Mac only has a limited amount of physical memory, it exposes a larger area of available virtual memory to running programs.
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