Hello, I remember that when I first got it out of the box my imac would start up (or boot up) quickly. But now it starts up a little slower...
Performance Tips For Mac OS X
Do I need to do some cleaning on my computer?
I don't know how...
I have heard about OnyX and using the Disk Utility but I still don't know what to do since I still don't know much about the applications that imac has or the other software like onyx.
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. Some 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. Some of these apps delete caches, which 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.
Mac 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.
this must be a funny question but, am I safe without an antivirus on my imac
You don't need any 3rd party antivirus app to keep your Mac malware-free. Macs are not immune to malware, but no true viruses exist in the wild that can run on Mac OS X, and there never have been any since it was released 10 years ago. You cannot infect your Mac simply by visiting a website, unzipping a file, opening an email attachment or joining a network. The only malware in the wild that can affect Mac OS X is a handful of trojans, which cannot infect your Mac unless you actively install them, and they can be easily avoided with some basic education, common sense and care in what software you install. Also, Mac OS X Snow Leopard and Lion have
anti-malware protection built in, further reducing the need for 3rd party antivirus apps.
mac runs its owm cleanup program but it set for 3.00am in morn.
i only use it to run the apple daily/ weekly/monthly cleanup progs as i not leave my comp on overnight a lot.
You don't need to manually run the daily/weekly/monthly Mac OS X maintenance scripts. If your computer is asleep or off at the time they're scheduled to run, they will automatically run the next time your computer is on.