I started out using Macs and still think they're the best computers anywhere. But I ended up with a Windows machine at home because I needed compatibility with a job that is Windows only. Now I'm trying to help my sister tweak her Mac, but all the best software I've found is Windows. Can someone suggest Apple equivalents to the following Windows products? Auslogics Defragmenter - Awesome freeware tool beats the built-in Microsoft defragmenter on every level. CCleaner - Always-reliable freeware tool for cleaning a hard drive: removes Temporary files, history, cookies, Autocomplete form history. Cleans Recycle Bin, Recent Documents, Temporary files and Log files. Simple interface. ESET - Small-footprint antivirus tool from a company that came out of nowhere and shot down all the big names. No bugs, excellent interface. Costs about $35/year and worth every penny. Malwarebytes Anti-Malware - Malware scanner/blocker/cleaner. Free version has almost all of the options of the "pro" version which only costs $25. Flawless performance for years. TreeSize Free - Freeware tool finds out what files are hogging all the space on your hard drive. Right-click on the drive icon and it generates detailed chart of files, folders, space used, etc. Excellent GUI. Any help would be greatly appreciated. Someday when I have the bucks, I'll return to Apple world!