El Capitan "no software to install problem" + firmware password.
Hello people, it is the fisrt time I write here hope to do it right.
I have a Macbook air 2013 i7 8GB 256GB recently upgraded to El Capitan. After the installation (within Yosemite ) I experience the following major issues:
1. Whenever I try to install new software the installer at the last step shows the message "installation fail because there is no software to install" (screenshot)
2. Screen black point is being raised and I get low contrast issues. I compared also with another macbook air that I know they had the same output.
3. After all this I decided to make a clean installation from a flash drive but before the boot menu options a padlock appears requests a firmware password
that I had never set. That pretty much means that I don't have access to any recovery options as well.
Hope for any suggestions, please also keep in mind I don't have access to native apple store.
MacBook Air, OS X El Capitan (10.11)