what are hiutil and mdworker? - they're maxing out the CPU!!

So I upgraded this afternoon to Lion on my 13" macbook air from the App Store; first of all the reboot crashed, then a hard off and back on sorted that out.


Now hiutil (and sometimes mdworker) are trashing the CPU constantly at 90-100% (and making the fan go crazy with it)


Anyone have any idea what these threads are?


My MBA is now unusable because of these!!



Cheers, Simmo

MacBook Air, Mac OS X (10.7)

Posted on Jul 20, 2011 8:49 AM

Reply
3 replies

Jul 20, 2011 8:52 AM in response to MrSimmo

mdworker is the Spotlight indexer. Spotlight is a bit wonky in Lion (as it was in SL 10.6.0)…be patient; it might not be fixed until 10.7.2 or so. If you don't use Spotlight, consider turning it off in SysPrefs. It'll cut that process.


hiutil seems to be a low-level process for Help pages. It's probably indexing those (to get the snappy search results from the Help menu).

hiutil(1) Mac OS X Manual Page

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

what are hiutil and mdworker? - they're maxing out the CPU!!

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.