推荐回答（3个）
关于iPhone授权和取消授权
通过对电脑进行授权和取消授权，最多可以在五台不同电脑（可以是 Macintosh 或 Windows 兼容电脑的任意组合）上使用或同步从 iTunes Store 购买的项目。当您同步或播放购买的某个项目时，电脑即获得“授权”，可使用您的 Apple ID 进行购买。备注：要启用“家庭共享”、“自动下载的项目”或下载过去购买的项目，必须授权电脑使用您的 Apple ID。来自 iTunes Store 以外来源的以 AAC 格式编码的歌曲（如您自己的音乐光盘）和 iTunes Plus 内容（音乐和音乐视频）不需要经过授权。如何使用您的 Apple ID 对电脑进行授权
1.打开 iTunes
2.从 Store 菜单中选取对这台电脑授权。（在早期版本的 iTunes 中，从高级菜单中访问此选项）。
1.打开 iTunes。
2.从 Store 菜单中选取取消对这台电脑的授权。（在较早版本的 iTunes 中，从高级菜单中访问此选项）。
1.点按 iTunes 左侧的 iTunes Store。
2.如果未登录到商店，请点按“帐户”按钮，然后输入您的帐户名和密码。
3.再次点按“帐户”铵钮（您的 Apple ID 显示在铵钮上），输入密码，然后点按“显示帐户”。
4.在“帐户信息”窗口中，点按“Deauthorize All（全部解除授权）”。
链接itunes, 选择 "商店(S)" 可以取消授权哦!
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