mac制作centos7 u盘安装盘

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1. 下载cento7的镜像

centos官网 去找想要的版本下载就行了。

比如这个阿里云的镜像可能会快些：http://mirrors.aliyun.com/centos/7.7.1908/isos/x86_64/CentOS-7-x86_64-DVD-1908.iso

2. 插上U盘

插上U盘，先查看一下电脑上有哪些盘

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$ diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         250.7 GB   disk0s2

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +250.7 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD - 数据     141.3 GB   disk1s1
   2:                APFS Volume Preboot                 82.4 MB    disk1s2
   3:                APFS Volume Recovery                528.1 MB   disk1s3
   4:                APFS Volume VM                      4.3 GB     disk1s4
   5:                APFS Volume Macintosh HD            11.1 GB    disk1s5

/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *15.7 GB    disk2
   1:               Windows_NTFS ESD-USB                 15.7 GB    disk2s1

/dev/disk2 就是我的U盘

2. 卸载U盘

卸载/dev/disk2:

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$ diskutil unmountDisk /dev/disk2
Unmount of all volumes on disk2 was successful

3. 使用dd 工具把镜像文件写到U盘里

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$ sudo dd if=/Users/huazhizui/Downloads/CentOS-7-x86_64-DVD-1908.iso of=/dev/disk2 bs=1m
Password:
4448+0 records in
4448+0 records out
4664066048 bytes transferred in 4102.428971 secs (1136904 bytes/sec)

整个过程可能需要几十分钟， 耐心等待。