If you are like me, you might be working on the Mac with dozens of windows open at the same time, yet trying to use the computer’s memory in the most economical way given the needs. As an application developer and a WordPress techie who spends most of his time working in and switching between the web browser windows, my IDE, database tools (especially Navicat), and the command line. Also I occasionally use a few applications from the Adobe Creative Cloud suite of products.
Once any Adobe application from the Creative Cloud suite is installed on a computer, Adobe first sets up a set of its mixture (or a hybrid) of ‘agent’ and ‘installation manager’ applications on the system, whose resources they could be consuming extravagantly. These little Adobe CC agent apps are always running and strutting around behind the scenes with GUI-less interfaces, even when you are not using a single Adobe application. And they are only noticeable from the list of background tasks and software daemons. To make things worse, they can be wasting a lot of your CPU time if not also a considerable amount of RAM.
In the first times, I personally did not care much about it, as I thought just hitting the Adobe CC icon (which resembles an infinity symbol) in the menu bar, and then quitting Adobe Creative Cloud from there would just shut it up, and reclaim all the memory and CPU it had been consuming.
Secret Agents also known as UNIX daemons Working in the Background
Adobe Creative Cloud software has a number of undercover agents always running in the background, apparently doing certain deeds of Adobe, even after quitting the application from the menu bar, or even when there is no single Adobe application that is active(ly running in the foreground) or one that you have ever launched. In fact, I have recently come to the realization that quitting Adobe Creative Cloud from the macOS menu bar does not really quit anything except removing its icon from where you last clicked it (in this case, the menu bar).
This can be clearly observed by watching them under-the-hood with the Mac’s Activity Monitor, or more conveniently with the command line bash utility from within the Terminal application.
However, Apple has also made web versions of these applications back in 2011. As of 2012, the software set was free to any purchaser of a new Apple product – a perpetual license is automatically granted to the associated Apple ID of such a customer so that they can download them for any of their Apple devices from Apple’s App Store.
As mentioned above, the alternative “Office” productivity suite consists of “Pages” the word processor which is pretty much compatible back and forth with the files created with Microsoft Word, “Numbers” the spreadsheet 
solution with artistic style so that aside from creating and working with traditional spreadsheets, you can also create ones which look like product brochures with stylish tables and formatting with an impressive (but not extreme) compatibility with Excel, and the last but not least is the “Keynote” application which is a presentation application that works the “Apple way”. These three applications can import and export most MS Office files (except those loaded with VBScript macros), and they are even capable of producing PDF outputs. With Pages, it is even possible to export your document as an ePub file – great news for self-publishing book authors!
To use these applications, all you need is a browser and an “Apple ID”. Very few users know that on any computer, be it a Mac, Windows PC or Linux/UNIX machine – especially one freshly set up with any applications not yet installed except a default web browser coming along out-of-the-box, one can just log in to 
iPhone works with MobileMe, Microsoft Exchange, and many of the most popular email systems. MobileMe and Microsoft Exchange provide not only email, but contact and calendar information that can be synced to iPhone automatically, over the air. MobileMe can also sync your bookmarks on iPhone with Safari on a Mac, or with Safari or Microsoft Internet Explorer on a PC. You set up MobileMe, Exchange, and other email accounts directly on iPhone.
