# Tex Utility breaks after upgrading to Tex Live 2015

OS: Mac OS X 10.10.3

I had Basic Mac Tex Live 2014 before. I upgraded to Mac Tex Live 2015 and then uninstall Tex Live 2014 by removing the folder `/usr/local/texlive/2014basic`.

After the upgrade, I found the installed packages missing when compiling the tex file. I checked in the Tex Live Utility and found some additional packages are `Not Installed` (i.e. the packages that are not distributed with basicTex).

When I tried to install the packages, an error popped out:

``````The repository at http://mirror.ox.ac.uk/sites/ctan.org/systems/texlive/tlnet
has TeX Live 2015, but you have TeX Live 18446744073709551615 installed.
You need to switch repositories in order to continue.
``````

I wonder where the version `18446744073709551615` come from. In the configuration of distribution, it is shown that `TeXLive-2015-Basic` is installed.

### EDIT

Sorry about not searching carefully. I found the cause and a workaround at the GitHub of Tex Live Utility: Issue 17.

The issue seems to be due to the distribution of Mac TeX Live.