hinder the creation of .fseventsd in mounted disks

fseventsd is the file services events daemon. It allows apps to register to receive notifications about changes to directory structures. If you disable it, don't expect any app that needs to know when a directory has changed to work correctly. If you want more in depth info about it try wading through this developer doc.

Likewise, if you disable Spotlight don't expect everything that depends on its indexes to work correctly. That is more than user searches.

The directories these system services create are normally hidden by OS X & any other UNIX-like OS that hides item names beginning with a period. They don't do any harm, take up relatively little space, & are essential for normal operation of OS X.

If you are bothered by them showing up on removable media that might be used with another OS, I suggest getting the free CleanMyDrive app from the Mac App Store. I use it with things like USB sticks that plug into my TV for photo slide shows, so that all the hidden non-photo files are removed from the stick when it is ejected from my Mac & don't show up in the TV's slide show menu. It works well for that.

I agree. Tools like CleanMyDrive are perfect for handling this type of detail on shared external volumes which often do not need these hidden folders and can clutter them when used in multi-platform environments. I wouldn't alter folders on the boot drive, but it won't harm anything to remove these from external drives or blocking their creation. I also wouldn't amake any alterations to specialized drives like Time Machine backups.

I agree that the OP is talking about crippling the OS, but there is no need to sell the Mac because of that. It is perfectly capable of running other OS's that run on Intel CPU's, including Windows & various "roll yer own" Darwin implementations.

Of course, that means sacrificing essentially all support from Apple & most of the "it just works" functionality of OS X, but only the OP can decide how well it suits his needs.

Topher Kessler wrote:

I also wouldn't amake any alterations to specialized drives like Time Machine backups.

I'm guessing that since the OP has already disabled Spotlight indexing, he isn't using Time Machine for backups. If he is, it isn't going to work very well, if at all.

Marek Stepanek wrote:

Is it so difficult to understand, that I don't want my truecrypt disks to be indexed?

You know that you can prevent anything you want from being indexed by adding them to the Privacy list in Spotlight preferences, right? You don't need to disable Spotlight to do that.

You are talking about crippling the basic functions of the operating system. Instead of doing that, I suggest you sell your Mac and use a platform that better meets your needs.