So I have this very old Macbook Pro, this was given to me and it's 7 years since then. I don't know the specific model but the previous OS installed is
OS X El Capitan 10.11.4.
CREATION OF BOOTABLE FLASHDRIVE
So I go to the official support of apple on how to create a bootable USB flash drive. I downloaded the
El Capitan 10.11 since it's the previous OS I have and I want to avoid compatibility issues, I just want to do a clean install. I have a very fast internet connection and I'm pretty sure that the installer I downloaded is not corrupted. I do this on the Macbook Pro itself and the creation of Bootable USB Flashdrive is successful. I do this just in case the online installation failed.
INSTALLATION USING ONLINE INSTALLER
Now, I booted into the system recovery first and from the Disk Utility, I completely erase the content of my SSD storage. Then I go back and use the option of online installation, upon signing in I got an error saying
This item is temporarily unavailable, I tried it again and again but it won't proceed. I found by searching that this is a known issue and the option is by using an offline installer by creating a bootable installer which is to happen that I have from the beginning.
INSTALLATION USING OFFLINE INSTALLER
So I plugin my bootable USB Flashdrive, I press and hold the
OPTION button while booting, I selected the USB Flashdrive which is in the boot list. The Apple logo shows up with the loading bar, after that this happened;
I tried it again, power off the machine, and boot then the same thing happened. Apple logo shows up with a loading bar after that the prohibited sign shows up again.
I search and people say that this is something related to the corrupted installer. I have fast internet and 6GB of El Capitan DMG file took only 5 minutes, well I thought maybe they are right so I opened up my Windows computer, and using VirtualBox with
High Sierra installed on it I recreated the Bootable Flashdrive. I downloaded the El Capitan installer again and create it, but after booting the same issue. I tried with other installers such as
El Capitan 10.11,
Yosemite 10.10 but they all have the same issue.
So what does this mean in the first place? And how can I push the installation?