1、首先单击打开finder。
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2、点击左侧应用程序，右侧可以看到应用程序列表。
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3、找到Ubuntu应用，鼠标右键点击应用图标，在右键菜单中点击显示包内容。
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5、然后进入boot/grub/目录下，因为是boot目录受限访问，一般会提示进行认证。grub目录下内容如图：
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6、然后，打开grub.cfg文件。建议用sublimtext打开。
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7、然后，如下图，强行写settimeout=0即可。重启，即可发现可跳过grub启动。一般在ubuntu进行系统更新时，上述设置会被修改回去，只要重复上述过程，即可重新完成跳过grub启动。
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