Hey, just got a 15" retina macbook pro. What are some of the must have apps that can improve the computers overall performance or help sustain its battery life?
There are many factors that impact your battery life. See the BATTERY LIFE FROM A CHARGE section of the following link for details, including tips on how to maximize your battery life.
The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.
If you're having performance issues, this may help:
You are wrong, CCleaner is like a one-stop-shop for deleting a load of crap and cached stuff you don't need.
You don't need "cleaner" or "maintenance" apps to keep your Mac running well, and some of these apps can do more harm than good. Most only remove files/folders or unused languages or architectures, which does nothing more than free up some drive space, with the risk of deleting something important in the process. These apps will not make your Mac run faster or more efficiently, since having stuff stored on a drive does not impact performance, unless you're running out of drive space.
In fact, deleting some caches can hurt performance, rather than help it, since more system resources are used and performance suffers while each cache is being rebuilt. Many of these tasks should only be done selectively to troubleshoot specific problems, not en masse as routine maintenance. OS X does a good job of taking care of itself, without the need for 3rd party software. Among other things, it has its own maintenance scripts that run silently in the background on a daily, weekly and monthly basis, without user intervention.
As for the 'power house' rMBP, it will slow down as the drive gets full of crap and traces of old deleted/upgraded applications remain etc.
False. A Mac will not slow down because there are traces of apps stored on the drive. As already stated, having things stored on the drive has absolutely no effect on performance, unless the drive is almost out of free space. That is one of the myths told by the sellers of such apps.
As for deleting app-related files, app removal software doesn't do a thorough job of finding and removing files/folders related to deleted apps. For more information, read
this and
this. If you just want to delete the app, drag the .app file to the trash. No other software needed. If you want to completely remove all associated files/folders, no removal apps will do the job.
The most effective method for complete app removal is manual deletion: