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Entry time:
Tue Feb 3 12:21:57 2026
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<p> <table width="98%" align="center" cellspacing="1" style="border:1px solid #486090;"> <tbody> <tr> <td cellpadding="3px" style="background-color:#486090; font-weidht:bold; color:white;">Quote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><p><strong>To get the newest root on a mac: this is what Carl and I went through today </strong></p> <p><strong>Note that root was installed on my mac by IT earlier</strong></p> <p> </p> <p><strong>First we tried:</strong></p> <p><strong><em>brew update</em></strong></p> <p><strong>That gave:</strong></p> <p><strong>==> Migrating root6 to root</strong></p> <p><strong>==> Unlinking root6</strong></p> <p><strong>Error: Error occurred while migrating.</strong></p> <p><strong>Permission denied @ unlink_internal - /usr/local/etc/root/HistFactorySchema.dtd</strong></p> <p><strong>Backing up...</strong></p> <p><strong>Error: Could not link:</strong></p> <p><strong>/usr/local/share/zsh/site-functions/_brew</strong></p> <p><strong>Please delete these paths and run `brew update`.</strong></p> <p><strong>Error: Could not link:</strong></p> <p><strong>/usr/local/share/doc/homebrew</strong></p> <p><strong>Please delete these paths and run `brew update`.</strong></p> <p><strong>Then we tried:</strong></p> <p><strong><em>brew upgrade</em></strong></p> <p><strong>this actually did work to download some things so that was good but did not really solve the problem </strong></p> <p><strong>Then: </strong></p> <p><strong><em>brew install root6</em></strong></p> <p><strong>Same problem: </strong></p> <p><strong>==> Migrating root6 to root</strong></p> <p><strong>==> Unlinking root6</strong></p> <p><strong>Error: Error occurred while migrating.</strong></p> <p><strong>Permission denied @ unlink_internal - /usr/local/etc/root/HistFactorySchema.dtd</strong></p> <p><strong>What is a symlink? </strong></p> <p><strong>symlink is a file pointer </strong></p> <p><strong>points to another location</strong></p> <p><strong>So, if you had a root on your computer (installed by IT in my case) you might have stuff on there that is conflicting with the new stuff</strong></p> <p><strong>for me, brew suggested I do this: </strong></p> <p><strong><em>brew link --overwrite root</em></strong></p> <p><strong>this gave lots of errors as I did not have permissions to write to lots of directories (as set up by IT) </strong></p> <p><strong>so then did</strong></p> <p><strong><em>sudo chmod 775 /usr/local/etc/root/*</em></strong></p> <p><strong><em>sudo chmod 775 /usr/local/etc/root/*/*</em></strong></p> <p><strong><em>sudo chmod 775 /usr/local/etc/root/*/*/*</em></strong></p> <p><strong><em>sudo chmod 775 /usr/local/etc/root/*/*/*/*</em></strong></p> <p><strong>And then: </strong></p> <p><strong><em>brew link --overwrite root</em></strong></p> <p><strong>Hopefully then you get </strong></p> <p><strong>Linking /usr/local/Cellar/root/6.10.08... 9717 symlinks created</strong></p> <p><strong>After this, I had the latest root and it worked</strong></p></td> </tr> </tbody> </table> </p><p> </p>
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