Apple says Spotlight indexing after a macOS Tahoe 26.6 update can take days (August 25, 2026)

What Apple published

The document is scoped to what happens 'after you install a software update or upgrade', and it covers Mac, iPhone, iPad and Apple Vision Pro. Spotlight rebuilds its index, and while that is running your search results are incomplete. On a Mac there is an indicator at the top of the Spotlight window telling you indexing is still going. Mail shows its own separate notification while email indexing is incomplete, so incomplete mail search has its own signal.

The line that matters is the duration. Apple's own words: 'Depending on the amount of data on your device, Spotlight indexing can take hours or even days.' No OS version numbers appear anywhere in the document, and no Mac models are singled out.

Why macOS Tahoe 26.6 is the trigger

Apple's release note for macOS Tahoe 26.6 reads: 'This update addresses bugs and security issues and also optimizes the Spotlight index in preparation for macOS 27.' That is on Apple's 'What's new in the updates for macOS Tahoe 26' page, Apple Support as published on August 17, 2026. An update that optimizes the Spotlight index is an update that hands a large indexing job to every Mac that installs it.

The two releases after it say nothing about Spotlight. macOS Tahoe 26.6.1 and 26.6.2 both read only 'This update provides security fixes for your Mac.' That same page stops at 26.6.2, which confirms that no macOS 26.6.3 or 26.7 had shipped as of that page's publication date. So 26.6.2 is the newest public Tahoe release I can confirm for this day, and it is what most people doing this indexing are running.

Apple calls this expected behavior, not a bug

I should be straight about the shape of this story. The document is guidance on making indexing finish sooner, not a defect report. Apple is not conceding a fault, promising a change or naming an affected build. It is saying that hours or even days is what this is, and here is how to help it along.

That still makes it the closest thing to an official answer for anyone whose Mac went slow and whose search went patchy after updating. Nothing I can verify shows a release that shortens the indexing work, so there is no version to wait for and no setting to turn it off.

The other Mac item dated to the same day

August 25, 2026 produced one other Mac security item worth naming, and it is not about indexing. A write-up published on August 25, 2026 by Resecurity put roughly 24,000 internet-exposed Macs listening on TCP 5900 still at risk from the macOS Screen Sharing authentication bypass tracked as CVE-2026-65400.

That count is that write-up's own, and I have nothing further dated to August 25, 2026 on it. Apart from those two items, the day carried no new macOS bug development that I could date to it.

What you can do today

1. If your Mac feels slow and search feels broken after an update, open Spotlight and look at the top of the window for the indexing indicator before you troubleshoot anything else.

2. Meet Apple's three conditions, which are verbatim: 'Your device is not in use.', 'Your device is connected to power.' and 'Your device is connected to the internet via Wi-Fi or Ethernet, in case email or other data needs to be downloaded for indexing.'

3. Plan for that cost honestly. Those conditions mean leaving the Mac plugged in, awake and unused for up to days, which is to say not using the machine you have just updated. If you cannot give it that, expect indexing to take longer and search to stay patchy in the meantime.

4. Check Mail separately. It posts its own notification while email indexing is incomplete, so patchy mail search does not need its own investigation until that notification clears.

5. Do not reset or rebuild anything on the strength of this. Apple's document names only those three conditions as speeding indexing up, and nothing in it suggests an index rebuild is the remedy for slow indexing.