Mac OS 10.10 Downgrade 10.9 tutorial

Most of the Mac user upgrade after 10.10, a variety of small problems, some users say that the most headache is the PD can not be stable operation, of course, some people can still, but I do not, methods are used or the same crash. Last night smoothly down to 10.9, all OK, the program is in, there is no loss, the dock bar is not disorderly, or the same as the original.

Indent step:

1, stop using FileVault.

2, open the app Store, find 10.9 systems, do not download here first.

3, then modify the system version number 10.8 (/system/library/coreservices/systemversion.plist) First copy out the systemversion.plist, inside two 10.10 modified to 10.8, modified, after the cover to the original position.

4, back to Apstore, began to download 10.9 system (here needs a power to the network), I downloaded 20 minutes, and then will automatically jump out of the installation, click Install.

In order to facilitate the subsequent 10.10 official version of the smooth upgrade, after installation, after downloading the installation again. But this time there is no need for the previous steps. Download the installation directly from the App Store.

There are a number of people who may be demoted after encountering some problems and I will provide solutions:

1, itunes is not available, my solution is to uninstall itunes with the Uninstall tool, and then go to the official website to download itunes, installation, installation, or can not use, then delete the music-itunes the following error file "ITunes library.itl"

2, Ibokks, can be directly updated, updated to use.

Small series of reminders: 10.10 Beta version of a lot of incompatible, working with Mac friends do not have nothing to toss. These are some of the most delicacy things left to developers and college students.