下面先总结遇到的问题，这些问题如果你也遇到，可能需要搜索很多次才能找到原因。
如果想看安装过程，可以先直接跳到后面第二部分部分。
1 问题汇总：
1.1 vagrant版本过高问题。
vagrant 1.8.7版本存在问题。可以搜索："vagrant 1.8.7 cant download box"
https://github.com/mitchellh/vagrant/issues/6725 也上有人提到。
/opt/vagrant/bin/vagrant -v
Vagrant 1.8.
vagrant box add centos /Users/user/box/src/centos65-x86_64-.box
==> box: Box file was not detected as metadata. Adding it directly...
==> box: Adding box 'centos' (v0) for provider:
box: Unpacking necessary files from: file:///Users/user/box/src/centos65-x86_64-20140116.box
An error occurred while downloading the remote file. The error
message, if any, is reproduced below. Please fix this error and try
again.
而且后面并没有列出具体的原因。要查看原因，即使开启debug。
VAGRANT_LOG=debug vagrant box add --name centos65-x86 /Users/user/box/src/centos65-x86_64-.box --checksum-type sha256 --checksum 84eda9c4f00c86b62509d1007d4f1cf16b86bccb3795659cb56d1ea0007c3adc --provider Virtualbox
# ...
DEBUG subprocess: stderr: dyld: Library not loaded: @rpath/libcurl..dylib
Referenced from: /opt/vagrant/embedded/bin/curl
Reason: Incompatible library version: curl requires version 9.0. or later, but libcurl..dylib provides version 7.0.
DEBUG subprocess: Waiting for process to exit. Remaining to timeout:
DEBUG subprocess: Exit status:
WARN downloader: Downloader exit code:
ERROR downloader: Exit code:
# ...
其中部分输出如上，提示/opt/vagrant/embedded/bin/curl的版本问题：
curl requires version 9.0.0
解决办法：
网上大多提示1.8.7版本确实有如下问题，建议重新安装1.8.6.
重新安装Vagrant 1.8.6
使用你系统的curl代替Vagrant curl
sudo ln -nsf /usr/bin/curl /opt/vagrant/embedded/bin/curl
实际上第二步不是必须的。
1.2 vagrant版本过低问题。
vagrant 1.8.1版本存在的问题。这个问题来自与virtulbox的版本配合上面。
/opt/vagrant/bin/vagrant -v
# Vagrant 1.8.
/opt/vagrant/embedded/bin/curl --version
# curl 7.45. (x86_64-apple-darwin12.6.0) libcurl/7.45. OpenSSL/1.0.2d zlib/1.2.
ls -trl ~/.vagrant.d/boxes/
# blank
VAGRANT_LOG=debug vagrant box add --name centos65-x86 /Users/user/box/src/centos65-x86_64-.box
# Successfully added box 'centos65-x86' (v0) for 'virtualbox'!
vagrant box list
# centos65-x86 (virtualbox, )
cd /Users/user/box/baseVM/
vagrant init centos65-x86
# A `Vagrantfile` has been placed in this directory. You are now
# ready to `vagrant up` your first virtual environment! Please read
# the comments in the Vagrantfile as well as documentation on
# `vagrantup.com` for more information on using Vagrant.
vagrant up
# ==> Provider 'virtualbox' not found. We'll automatically install it now...
# ==> Downloading VirtualBox 5.0....
从上面可见，1.8.1版本并不能识别到VirtualBox 版本 5.1.10 r112026 (Qt5.6.2)
下面是网上说明；
Vagrant 1.8.4 and older are not compatible with the VirtualBox 5.1.x.
Vagrant 1.8.5 has been released already and it supports the VirtualBox 5.1.x.
因此为了配合最新的vb。需要使用vagrant 1.8.5 ~ 1.8.6版本。
1.3 vagrant box下载失败
默认的下载地址：http://www.vagrantbox.es/
下载不太稳定，下了好多次都中途失败。提示"失败 - 已被禁止"。原本是要使用CentOS 6.4 x86_64版本的。结果总下载不了。最后使用了这个版本。
https://github.com/2creatives/vagrant-centos/releases
网页上该文件的检验码：:
SHA256(centos65-x86_64-20140116.box)= 84eda9c4f00c86b62509d1007d4f1cf16b86bccb3795659cb56d1ea0007c3adc
check it:
shasum -a256 centos65-x86_64-.box
84eda9c4f00c86b62509d1007d4f1cf16b86bccb3795659cb56d1ea0007c3adc centos65-x86_64-.box
md5 centos65-x86_64-.box
MD5 (centos65-x86_64-.box) = c6518b158f7babd09dcccc30eb3d9333
为了方便大家下载。我在网盘上放了一个文件，大家可以使用上面的信息自行校验，我也没有水平在这个镜像中装后门，呵呵。
密码：2fdm
2 源文件
经过几轮折腾。确定了各版本。
本机系统：OS X 10.11.3
virtualBox: VirtualBox-5.1.10-112026-OSX.dmg
vagrant_1.8.6.dmg
box: centos65-x86_64-20140116.box
3 安装vb和vagrant
分别手动安装virtualBox和vagrant。安装后
vb下载地址：https://www.virtualbox.org/wiki/Downloads
vagrant地址：https://www.vagrantup.com/downloads.html
vagrant历史版本：https://releases.hashicorp.com/vagrant/
vagrant box: http://www.vagrantbox.es/
安装后检查：
/opt/vagrant/bin/vagrant -v
# Vagrant 1.8.
/opt/vagrant/embedded/bin/curl --version
# curl 7.45. (x86_64-apple-darwin13.4.0) libcurl/7.45. OpenSSL/1.0.2e zlib/1.2.
ls -trl ~/.vagrant.d/boxes/
# blank
VAGRANT_LOG=debug vagrant box add --name centos65-x86 /Users/user/box/src/centos65-x86_64-.box
# ==> box: Successfully added box 'centos65-x86' (v0) for 'virtualbox'!
ls ~/.vagrant.d/boxes/centos65-x86//virtualbox/
total
-rw-r--r-- user staff : metadata.json
-rw------- user staff : box.ovf
-rw------- user staff : box-disk2.vmdk
-rw------- user staff : box-disk1.vmdk
-rw-r--r-- user staff : Vagrantfile
vagrant box list
# centos65-x86 (virtualbox, )
cd /Users/user/box/baseVM/
vagrant init centos65-x86
#A Vagrantfile has been placed in this directory. You are now
#ready to vagrant up your first virtual environment! Please read
#the comments in the Vagrantfile as well as documentation on
#vagrantup.com for more information on using Vagrant.
ls -l
#total
#-rw-r--r-- user staff : Vagrantfile
启动：
vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Importing base box 'centos65-x86'...
==> default: Matching MAC address for NAT networking...
==> default: Setting the name of the VM: baseVM_default_1480320850854_85192
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
default: Adapter : nat
==> default: Forwarding ports...
default: (guest) => (host) (adapter )
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
default: SSH address: 127.0.0.1:
default: SSH username: vagrant
default: SSH auth method: private key
default:
default: Vagrant insecure key detected. Vagrant will automatically replace
default: this with a newly generated keypair for better security.
default:
default: Inserting generated public key within guest...
default: Removing insecure key from the guest if it's present...
default: Key inserted! Disconnecting and reconnecting using new SSH key...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
default: The guest additions on this VM do not match the installed version of
default: VirtualBox! In most cases this is fine, but in rare cases it can
default: prevent things such as shared folders from working properly. If you see
default: shared folder errors, please make sure the guest additions within the
default: virtual machine match the version of VirtualBox you have installed on
default: your host and reload your VM.
default:
default: Guest Additions Version: 4.3.
default: VirtualBox Version: 5.1
==> default: Mounting shared folders...
default: /vagrant => /Users/user/box/baseVM
检查进程
ps axu | grep -i virtual
# ...
从上面可以看到登陆信息：
127.0.0.1:2222
default: SSH username: vagrant
用户名与密码均是： vagrant
但登陆并不需要输入用户名或机器及端口。
登陆：
vagrant ssh
[vagrant@vagrant-centos65 ~]$ pwd
/home/vagrant
ls -l /vagrant/
total
-rw-r--r-- vagrant vagrant Nov : Vagrantfile
至此成功进入vagrant虚机。
就在写这篇文章时，发现1.9.0已经出来了。可以试下最新版本了，应该修复了1.8.7的问题。