Computers began using the term "steam" as a synonym for industrial steam used in the process of industrial engineering. It was not until sometime after World War II did the computer industry to begin making use of the term "steam" to refer to computerized steam power or central processing units (CPU's) that put the entire computer system on auto pilot. This is essentially how the modern day computer works today - with the CPU, a microprocessor chip inside the computer, working in tandem with an embedded memory chip and a number of fast (preferably high speed) peripheral devices running on dedicated bus lines to the rest of the computer. The CPU is basically a very tiny computer inside a much larger machine.
For those running Microsoft based computers, having a dedicated server account is one way to avoid problems when Steam tries to launch. Unfortunately, Macs do not have these options available to them as yet, but that might soon change. How to Prevent Steam From Opening itself on Mac. The easiest way to stop auto-launching of Steam application on Mac is to remove it from its login items program list, which is set in a user account level, meaning that if you own multiple user accounts on a Mac then you would have to repeat this procedure for every user on that Mac. You could also prevent Steam from launching automatically by setting your Mac to remember your login details so that Steam never has access to your account again.
There are third party add-ons that you can buy for your Mac that will allow you to bypass Steam, at least while you are still using your Mac. These add-ons are not free of charge, and there is typically an amount of money that you have to pay out before the add-on starts working. If you are willing to pay for this kind of add-on then I recommend that you use it because it will protect you from possible future security issues associated with Steam. To get started, you simply have to download an Add-On manager for Steam and install it on your Mac before you are going to be able to run Steam application on your Mac again. This way you are sure that you are completely protected from any malicious programs that might try to gain access to your Mac user account and potentially cause you a lot of damage.