Hi there and welcome
Retina is some way off still Albert, and is not yet in use nor in the near future.
You could use one password ***** everything, but I Strongly advise against this as once one account is hacked, then all your accounts are hacked.
What I advise to use is a free program called Keepass which you can get here
It is a program that allows you to manage all your passwords so it is easy to manage and look up, you can also have it log you in for this.
It is the best solution for this Albert, as you want to keep your passwords separate and different for security but easily manageable which this programs allows for.
The application is free, it does not cost anything.
The link is working fine, just click on it please, the text in the Blue then click on download
Ok, thats the one that says it is for Windows, if you are on Windows then use that one, if you are not on windows but a mac then use the one that is for the Mac which is the portable one (the 4th one)
No it is not a joke, it is one of the most used programs for password ***** and there has never been issues in the past with installing this.
I have downloaded it from there and uploaded it to another site for you
Download the direct file from here please
It is downloading, I tested it here, but it appears there is an issue on your computer stopping this so please try from this link
ok, this is Gatekeeper that you have enabled.
Right-click (or control-click) the application in question and choose “Open”
Click the “Open” button at the next dialog warning to launch the app anyway
ok, it is not normal to have such issues installing this, but the only cause could be other software or incompatibilities stopping it.
And alternative program is LastPass which is also a pretty good password ***** tool and also free.
Are you able to install it from here?
Make sure to choose the Mac install version please.