Did you noticed that the el capitan stuck on boot ? If you do not have any idea about that why it is happening and what to do now then go through this post get complete information. The el capitan is an operating system for the Mac computer. Sometimes while installing this the user will observe that the el capitan stuck on boot. Well, this issue is faced by number of Mac users. There would be two reasons behind this issue. Firstly, this would happen due to any interruption in installing the el captain OS or due to incorrect way of installation. The another reason behind this issue might be missing of some internal file or extensions. Sometimes it happens that in order to installing the sl capitan operating system some of its internal file or extensions has not been called and this results to el capitan stuck on boot. Here you need to forcely turn off the computer and again turn it on. If the problem is still remains same then you should reinstall the el capitan operating system. It is informed you that if this situation or another issue will cause the loss of your data from your Mac computer then you should take help of Mac data recovery software to get back the all lost data in a quick way.