Snow Leopard 10.6 Reitail 苹果雪豹操作系统下载

虽然零售光盘还没邮寄到，但是自己已经等不及了，从网上下载了一个雪豹零售版（10432A）的镜像回来。正准备安装的时候，突然在麦芽地，Macidea等地方发现了有人说下载版MD5值和正版碟的MD5值不同。赶紧查了一下。其实这只是个误会而已。

说MD5值与正版碟不同的人用的校验方法肯定是直接检查的DMG镜像的MD5值，而在MAC OS中通用的方法是挂载镜像，然后检查MD5值。

DMG类似于ISO，只是一种封装格式，其内部使用什么格式是可以变化的，包括压缩算法和压缩比、是否可读写等等。举个例子，同样一个文件使用zip压缩，一个选择低压缩比，一个选择高压缩比，出来的两个压缩文件md5校验一定是不同的，因此对dmg直接校验是没有任何意义的！

这就是为什么我们在磁盘工具里选择对挂载之后的dmg或者干脆就是刻录好的光盘进行镜像校验，只有这样才能保证校验的对象是同一个！

所以其实两个MD5都是正确的，只是方法不同而已。

下边是三种不同的检测方法，得到的MD5有所不同，但是都是同一张盘，已经证实，先前泄露的10432A和正式版光盘是一模一样的。

Windows下校验值为（检验对象：h-sl106.dmg）
CRC32: 0D9AAA01
MD5: 1D1FB7ECA55470143C153F7F902B4ADA
SHA-1: B8AA5C0DCB0830D9B9888676ACCC2667A4034B4A

MAC OS 磁盘工具对挂载镜像检验（检验对象：盘符 Mac OS Install DVD ）
CRC32: $713800C0
MD5: $FD619787FE90525ECE05ECBCFF651B92

MAC OS 磁盘工具对DMG镜像检验（检验对象：h-sl106.dmg）
MD5: $817F2D9CFB56885D6E8E3FD99855B691

Mac OS X 10.6 Snow Leopard v10.6 Build 10A432 Retail（DMG镜像）雪豹正式零售版

BT种子下载
MAC.OSX.SNOW.LEOPARD.V10.6-HOTiSO.rar

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