@Rosicky: Gibt es da einen erklärbaren Grund für den Zusammenhang und tritt das Problem nur auf, wenn Fremdprogramme Daten im Benutzerordner ablegen oder generell, wenn dieser viele Daten enthält?
Edit: anders gefragt - würde es helfen, den Benutzerordner vorübergehend zu leeren?
Wenn ich das richtig verstanden habe ist das Problem wohl, dass beim Update auf Yosemite der komplette Ordner verschoben wird. Dieses geht nur recht langsam vonstatten. Folge je größer der Ordner, desto länger die Installationszeit.
Ich kopiere hier mal einen Auszug von der MacTex-Seite hin:
Installing Yosemite
We have two reports from users who updated from Mavericks to Yosemite rather than installing Yosemite on a fresh disk partition. Both users report that when the installation was almost complete, there was a long delay with no feedback: one hour in one case and twelve hours in another. During this delay, the installer's log file reported that it was copying TeX Live files one by one from "/Volumes/Hard Disk/Recovered Items/usr/local/texlive" to "/Volumes/Hard Disk/usr/local/texlive".
(Report by Koch) I did not run into this problem with the developer version of Yosemite, but I installed on a fresh partition and then used MacTeX to install TeX. When Yosemite was released on October 16, I installed again on Apple's 2012 Macbook Pro with Retina Display, this time updating a copy of Mountain Lion to Yosemite. This portable has a solid state drive. Sure enough, there was a long delay when the installer stated "About 2 minutes remaining," with the predicted messages in the log file. This machine had TeX Live 2013, TeX Live 2014, and Basic TeX 2014 installed.
In my case, the full installation of Yosemite took one hour and 56 minutes. Initially the installer reported that installation would require 18 minutes. It later updated this to 55 minutes, but by the 18 minute mark it was predicting completion in another 2 minutes. At that point there was a long delay, and the predicted 18 minute install took an hour and a half. After that the machine rebooted twice, and then a second installation began. The computer reported that this installation would take 7 additional minutes, but the final stage only took 6 minutes.
The earlier user and I let the installation proceed to completion and ran into no problems. But canceling the installation could produce an unworkable TeX Live.
Avoiding the Problem
Ross Moore sent an extremely useful method of avoiding the problem. He writes
"A colleague tells me that the way to update to Yosemite, with one or more TeX installations installed, is to first
mv /usr/local/texlive ~
do the install, then
mv ~/texlive /usr/local
"This avoids the installer archiving then re-installing that hierarchy *file-by-file*. This kind of approach may be useful with other subdirectories of /usr/local as well."
This solution moves the texlive directory to the User's home directory, installs Yosemite, and then moves the texlive directory back to its proper location. In more detail, the appropriate commands are as follows (spaces in these commands are essential, so copying the commands may work better than retyping them):
sudo mv /usr/local/texlive ~
install Yosemite
sudo mv ~/texlive /usr/local
