WOW.... The new imac 2019 is Awesome!

Started 5 months ago | Discussions thread
Tom_N Forum Pro • Posts: 15,772
Re: WOW.... The new imac 2019 is Awesome!

EdwardWestonNYC wrote:

Not sure what the memory usage difference is btw Mac OS and Windows. My Windows machines seemed to eat and use ram like wild.

Something that others here have observed is that macOS can be aggressive about filling RAM with cached data.  The reasoning is that until such time as an application needs the RAM, the OS might as well use it for cache (in hopes of saving some HDD/SSD I/O).

Recent versions of macOS have an Activity Monitor indicator called "Memory Pressure", a graph showing memory availability in terms of traffic-light-style Red/Yellow/Green.  Red is an indicator that memory resources "are depleted" and that you "may need more RAM."

Apple – How to use Activity Monitor on your Mac

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