原因

纳尼，Mac电脑用Navicat连接Oracle报错了，平时用来连接MySQL甚是好用，今天准备连接Oracle数据库看下数据，竟然连接不上。emmm.......

点击连接测试失败后弹出异常：

ORA-24454：client host name is not set？？？

解决办法

打开终端，输入hostname

$ hostname 
amaocldeMacBook-Pro.local

然后看下/etc/hosts文件内容

$ cat /etc/hosts
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1             localhost
# Added by Docker Desktop
# To allow the same kube context to work on the host and the container:
127.0.0.1 kubernetes.docker.internal
# End of section

发现hostname不一致

执行命令：sudo scutil --set HostName localhost

重新测试连接成功