If your wallpaper changes back to default (Galaxy) after reboot or after logout it is because

the wallpaper you set was on another drive.
and this drive loads after your settings are loaded.

MAC OS X Lion / Mountain Lion does not save your wallpaper on the native HDD, rather tries to load the wallpaper from the original HDD, i guess only the path to the wallpaper is saved in the OS X settings.

Anyways..
what happens is that when your OS X boots up it does not find the path to your wallpaper since the HDD you've saved your wallpapers in has not mounted yet. :(

One basic solution for this is to save your wallpapers in the HDD where you've installed the MAC OS X..

but I didnt want to save all my wallpapers in Native Mountain Lion HDD, so i figured out my perfect fix..!!

This is how i fixed..

I found this file in my Mountain Lion install pendrive.. autodiskmount.plist

Library/Preferences/SystemConfiguration/autodiskmount.plist

If you can't find it on your OS X Install Drive then you can make one by typing

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="0.9">
<dict>
<key>AutomountDisksWithoutUserLogin</key><true/>
</dict>
</plist>

rename ur txt file to autodiskmount.plist

or download the file from this post.

save this in your MAC OS X HDD

Library/Preferences/SystemConfiguration/autodiskmount.plist

Voila..!!

restart your system..

同样问题的解决办法，暂时没时间测试，记录备查。
http://www.tonymacx86.com/general-help/62011-wallpaper-changes-default-after-reboot-fix.html

过保的话去中关村大概300换一个。

find / -name "*AppName*"

现在程序员大都用Mac，用Mac的大都只用Trackpad不用鼠标哇

我在互联网行业10多年，从未见过ASM的应用。

对比结果，确实是Retina的问题，12年Air上10.10就流畅得多

再强调一次，各人对流畅的敏感度不同，同样的效果有人觉得流程有人觉得卡顿。
但是这次10.10的卡顿投诉率肯定是偏高的。

是macbook pro retina型号，另外不同人对流畅的体验标准不同，我已经算是比较麻木的了，都能感觉到各种动画过程的小卡顿和系统对键盘输入的响应延迟

@mahone3297 Air可以选配，我的12年Air选的i7、8G、256G，到现在也不觉得慢

顺便问一下，使用Mac迁移助理从旧电脑往新电脑迁移数据，新电脑的已有文件会被抹掉吗？

使用Mac迁移助理从旧电脑往新电脑迁移数据，新电脑的已有文件会被抹掉吗？

公物我就不换了，加卡吧

@cloud107202 多谢

@qianlicao353 SSD不是固化的吗，怎么加？有什么推荐型号？

多谢各位

@cosmosz 那我希望系统恢复出厂状态，清除一切个人信息，但是希望系统为最新版本，应当如何做？

@kchum 如何确保你说的恢复区为10.10？

5.0.1都受到了。