Yes, Textastic does support .xsd files.

Hello,

it is possible to add add custom syntax definitions to Textastic by using TextMate bundles. See

http://www.textasticapp.com/v4/manual/lessons/How_can_I_add_my_own_syntax_definitions__themes_and_templates.html

A quick search for "xojo tmbundle" in Google didn't bring up a TextMate bundle though, so there doesn't seem to exist a compatible syntax definition at the moment, sorry.

Yes, there will be a free iOS 7 update. I recently posted a screenshot on Twitter: https://twitter.com/Textastic/status/405727895685169153

A split screen mode is not planned, but you can quickly show the preview by tapping on the "eye" button in the current version ("glasses" in the iOS 7 version).

Here is how it looks over here:

lrwxr-xr-x   1 lextar  staff    80  8 Sep 19:19 com.textasticapp.textastic-mac.LSSharedFileList.plist -> ../../../../../Preferences/com.textasticapp.textastic-mac.LSSharedFileList.plist

-rw-------   1 lextar  staff   910 29 Nov 19:46 com.textasticapp.textastic-mac.plist

So this does look fine.

Interesting. It seems like Textastic wasn't able to create the file itself. Maybe there is an issue with the sandboxing system on your machine.

Since this is the sandbox container that is only visible to the app, it is normal that those files are just links to the original files.

The list of recent files should be saved in the file "com.textasticapp.textastic-mac.LSSharedFileList.plist" that is in the same directory.

On which version of OS X is this?

Where did you save the file? iCloud or local disk?

Ok, I've created an (almost) empty file which you can download here: http://www.textasticapp.com/other/com.textasticapp.textastic-mac.plist.zip

Can you try to unzip the file and put it into this directory?

It should grow in size when you start Textastic, change preferences and quit the app.