Good afternoon, 

I am running OSX 12.1 Monterey on a 2017 iMac with a 1 TB SSD

In About this Mac - Storage - it showing I have 387 GB of System Data

One of the things I have found is a folder inside System/Library called dyld 
that contains 28 GB of cache files. I poked around in here after googling what 
could be hogging the disc space. One reference suggests I can delete this cache 
files as the OSX will rebuild them as needed. That reference was from 2012. Is 
that information still accurate or should I back out and stop looking. 

Any other hints on the mysterious 387 GB on the disc. I use CleanMyMac and that 
is supposed to clean extraneous files left from previous OSX. 

Thanks

Tim
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