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Re: Purgeable Disk Space

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On 11 Jan 2025 at 08:06:35 GMT, "RJH" <patchmoney@gmx.com> wrote:

> Reading from Disk Utility, the 500GB SSD (Apple SSD/Container disk1/Macintosh
> HD) on my 2020 Intel iMac is showing 25GB available, 470GB used.
> 
> In the Macintosh directory below is a volume (or partition?) called 'Macintosh
> HD - Data' which is showing 500GB capacity, 170GB available, 140GB purgeable,
> 460GB used.
> 
> How do I 'purge' the 140GB?
> 
> I've tried restarting, and searching using Finder shows only the files I'd
> expect over 1GB - apps and video files. The only odd thing in
> Settings/General/Storage is something called System Data at 135GB, but I don't
> know what/where that is.

As others mention it's macOS managed. As long as it's tagged as
purgeable, which it is, then macOS will ditch it when it's outlived its
usefulness - or while you're copying in 300gig of files :)

To see if some of that space is local TM snapshots, if you like you can
clear those dowm at the terminal:

  tmutil thinlocalsnapshots / 9999999999999 4

From the manual page:

 tmutil thinlocalsnapshots mount_point [purge_amount] [urgency]
  Thin local Time Machine snapshots for the specified volume.
  When purge_amount and urgency are specified, tmutil will attempt (with
urgency level 1-4) to
  reclaim purge_amount in bytes by thinning snapshots.
  If urgency is not specified, the default urgency will be used.

    Cheers - Jaimie
-- 
'It's one of those irregular verbs, isn't it? `I protect the
lives and property of my citizens; you keep the public
safe from an unreasonable and trouble-generating
minority; he maintains a totalitarian regime of
thought control.'                -- Bernard, Yes Minister

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Purgeable Disk Space RJH <patchmoney@gmx.com> - 2025-01-11 08:06 +0000
  Re: Purgeable Disk Space John Hill <watcombeman@yahoo.co.uk> - 2025-01-11 08:41 +0000
    Re: Purgeable Disk Space Alan B <alanrichardbarker@gmail.com.invalid> - 2025-01-11 09:13 +0000
    Re: Purgeable Disk Space RJH <patchmoney@gmx.com> - 2025-01-11 11:50 +0000
  Re: Purgeable Disk Space Jaimie Vandenbergh <jaimie@usually.sessile.org> - 2025-01-11 10:15 +0000
    Re: Purgeable Disk Space RJH <patchmoney@gmx.com> - 2025-01-11 11:51 +0000
  Re: Purgeable Disk Space RJH <patchmoney@gmx.com> - 2025-01-23 14:35 +0000

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