Does deleting old Asahi partitions and/or growing the macOS partition cause overhead reported by the installer?

[rxhfcy]

This is just a guess, feel free to close this issue if this speculation is not useful.

From 53175af:

Looks like a lot of newer installs end up with 13GB or so of overhead as
calculated by the installer. This is confusing users. We still have no
idea what this is about or where it comes from

My guess: could the overhead from newer installs have something to do with people deleting their old Arch partitions and/or then growing their macOS partition back to its original size (I know growing the macOS partition back is not a necessary step when reinstalling but does everyone know that)?

I used the installer to make room for a new Asahi partition, installed Asahi and then followed the steps from the Partitioning cheatsheet to delete the partitions and grow the macOS disk to full size again.

Before doing that, the installer reported no overhead, but after that, it reported lots of overhead.

Suggested steps to reproduce if you want to test this:

1. Use the installer and the overhead is hopefully 0
2. Delete the Asahi partitions(s) using the cheatsheet
3. Grow the macOS disk back to full size
4. Use the installer again, is the overhead now bigger than 0?

[MicahBird]

I'm able to reproduce this issue. I installed Asahi Linux normally, then realized I didn't set the desired partition size correctly for the Asahi Linux install, used the wipe script to uninstall it, and now this is what the installation script reports.

We're going to resize this partition:
  APFS [Macintosh HD] (994.66 GB, 6 volumes)
  Total size: 994.66 GB
  Free space: 210.57 GB
  Available space: 146.86 GB
  Overhead: 25.71 GB
  Minimum new size: 847.80 GB (85.23%)

  Warning: The selected partition has a large amount of overhead space.
  This prevents you from resizing the partition to a smaller size, even
  though macOS reports that space as free.

  This is usually caused by APFS snapshots used by Time Machine, which
  use up free disk space and block resizing the partition to a smaller
  size. It can also be caused by having a pending macOS upgrade.

  If you want to resize your partition to a smaller size, please complete
  any pending macOS upgrades and visit this link to learn how to manually
  delete Time Machine snapshots:

    https://alx.sh/tmcleanup

This is on a clean install of macOS Sonoma 14.5 (23F79), with no Timemachine snapshots made. Does anyone know how to remedy this, or if's even something to worry about? Thanks in advanced!