Which caches does Safe Mode empty?

Discussion in 'Mac Basics and Help' started by gogreen1, Oct 22, 2018.

  1. gogreen1 macrumors regular

    gogreen1

    Joined:
    Nov 20, 2017
    #1
    I've read that running Safe mode "deletes font caches, kernel cache, and other system cache files." So in addition to font caches and the kernel cache, which caches does safe mode specifically delete?
     
  2. hobowankenobi macrumors 6502a

    Joined:
    Aug 27, 2015
    Location:
    on the land line mr. smith.
    #2
    Good question. Have never looked to see exactly what the "system caches" are (number or specific types of files), but it could be that it varies slightly by OS and perhaps even by hardware.

    If you want to do more (safe) maintenance cleaning, check out Onyx for Mac. Been using it for years, never seen an issue. Free, never any nags or automatic anything to fiddle with, forget, or deselect. There may be some info on the specific caches that get deleted either in the app or the logs generated when it is run.
     
  3. gogreen1, Oct 22, 2018
    Last edited: Oct 22, 2018

    gogreen1 thread starter macrumors regular

    gogreen1

    Joined:
    Nov 20, 2017
    #3
    Funny you mentioned Onyx. I do use it, and it's what prompted my asking about Safe Mode. Onyx's maintenance lists a bunch of caches and other items to be cleaned, and I was wondering if Onyx duplicates the items that Safe Mode cleans.

    My only problem with Onyx is that when it restarts automatically, 1Password does not work in Safari until I shut down the iMac and reboot again. I've tried a manual restart, and just closing and reopening Safari, all for naught. Is there an Onyx setting I missed that's causing this to happen?
     
  4. hobowankenobi macrumors 6502a

    Joined:
    Aug 27, 2015
    Location:
    on the land line mr. smith.
    #4
    My hunch would be the issue would be specific to browser history, cache, etc., and you might try NOT deleting browser cache in Onyx, unless you have a problem to solve.

    I would expect Onyx would be deleting the caches that are safe, and global, same as Safe Mode, and some other tools do. But again, just an educated guess, never dug up the differences.

    Technically any and all cache is safe to delete by design, at least with regard to stability and user specific saved data. Cached info is simply remembered info, which is faster to load that finding and reloading the original data, or rechecking, validating, or just reading the original....particularly on hard drives.

    It does get a little tricky around browsers that typically will cache as much as possible to increase speed. Clearing the cache means reloading the original information, and that may including loading pages from scratch, as well as re-calculating stuff like like screen position monitor size, etc. It all adds a little time. I expect is varies a bit by browser, and even to some degree by the version.
     
  5. gogreen1 thread starter macrumors regular

    gogreen1

    Joined:
    Nov 20, 2017
    #5
    Thanks, hobowankenobi. I'll test not emptying the browser cache in Onyx and see what happens.
     

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4 October 22, 2018