Installing 10.6 Snow Leopard Resets your /etc/hosts file

Sep 1, 2009 - 6 Comments

mac os x icon OS X Daily reader Todd Harris has tipped us off that when installing Mac OS X 10.6 Snow Leopard, your /etc/hosts file is reset. If you followed a tip we posted a while back about how to block access to specific websites then this is particularly relevant to you, so be sure to manually adjust /etc/hosts again so that the sites you want blocked are reincluded. Of course there are many other uses for /etc/hosts too, so the long story shortened is this: if you have a custom /etc/hosts file, back it up prior to and restore it after you have finished installing 10.6 Snow Leopard! Thanks for the tip Todd!

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Posted by: Paul Horowitz in Mac OS, Troubleshooting


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  1. joe says:

    i lost my host file if i upgrade to snow leopard will it install it??

  2. aaron says:

    My /etc/hosts file doesn’t seem to affect anything. I’m trying to migrate a web site from one server to another and I set the domain to the new IP for testing and it still points to the old IP. I cleared my cache and tried another browser just


  3. Mike says:

    My etc/hosts file is unaffected as well. I did an upgrade install, so I assume that’s why nothing changed. Time Machine doesn’t touch etc so if you do a clean install and try to restore that’s probably why its “reset”.

  4. jake says:

    I’m really digging Snow Leopard, but I have my fair share of qualms as well. No more cut and pasting Address Book contacts??? Check the rest out here:

  5. DistortedLoop says:

    My hosts file also survived the upgrade or install on multiple machines, but I suspect that’s the key, we upgraded or transferred old systems, which preserved settings like the hosts file. Obviously a clean install that doesn’t include transferring data (users, settings, etc) from an old system will result in a fresh hosts file as well.

  6. Moridin says:

    My host file is just fine after the upgrade.

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