X does work on its own as far as I can tell. i.e. windows pop up when I click on xman or xlogo.
This is what shows up on the control panel when I open inkscape:
Marker - Mar 9, 2014 4:08:25 PM
Mar 9 16:08:30 localhost [0x0-0x64064].org.inkscape.Inkscape[22119]: Setting Language: .UTF-8
Mar 9 16:08:30 localhost [0x0-0x64064].org.inkscape.Inkscape[22119]: (process:22121): Gtk-WARNING **: Locale not supported by C library.
Mar 9 16:08:30 localhost [0x0-0x64064].org.inkscape.Inkscape[22119]: Using the fallback 'C' locale.
Mar 9 16:08:34 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx[22169]): posix_spawn("/opt/X11/lib/X11/xinit/launchd_startx", ...): No such file or directory
Mar 9 16:08:34 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx[22169]): Exited with code: 1
Mar 9 16:08:34 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx): Throttling respawn: Will start in 10 seconds
Mar 9 16:08:45 localhost Inkscape[22119]: kCGErrorInvalidConnection: CGSGetWindowTags: Invalid connection
Mar 9 16:08:45 localhost Inkscape[22119]: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
Mar 9 16:10:14 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx[22181]): posix_spawn("/opt/X11/lib/X11/xinit/launchd_startx", ...): No such file or directory
Mar 9 16:10:14 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx[22181]): Exited with code: 1
Mar 9 16:10:14 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx): Throttling respawn: Will start in 10 seconds
If I click on inkscap a second time, X11 opens up the following appears on control panel:
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: X11.app: DISPLAY ("/tmp/launch-tAoTeK/org.macosforge.xquartz:0") does not match our id ("org.x"), unsetting.
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: X11.app: main(): argc=2
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: argv[0] = /Applications/Utilities/X11.app/Contents/MacOS/X11.bin
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: argv[1] = -psn_0_413797
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: Waiting for startup parameters via Mach IPC.
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: X11.app: Could not connect to server (DISPLAY is not set). Starting X server.
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: X11.app: Launching /usr/X11/bin/startx:
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: argv[0] = /bin/sh
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: argv[1] = -c
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: argv[2] = /usr/X11/bin/startx
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: font_cache: Scanning user font directories to generate X11 font caches
Mar 9 16:10:25 localhost [0x0-0x65065].org.x.X11[22183]: font_cache: Updating FC cache
Mar 9 16:10:25 localhost org.x.privileged_startx[22196]: font_cache: Scanning system font directories to generate X11 font caches
Mar 9 16:10:26 localhost defaults[22226]:
The domain/default pair of (/Users/admin/Library/Preferences/org.x.X11.plist, dpi) does not exist
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: xauth: file /Users/admin/.serverauth.22189 does not exist
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: launch_msg("CheckIn") IPC failure: Operation not permitted
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: X11.app: No launchd socket handed off, unsetting DISPLAY
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: X11.app: do_start_x11_server(): argc=6
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: argv[0] = /usr/X11/bin/X
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: argv[1] = :1
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: argv[2] = -nolisten
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: argv[3] = tcp
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: argv[4] = -auth
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: argv[5] = /Users/admin/.serverauth.22189
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: Xquartz starting:
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: X.Org X Server 1.10.6
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: Build Date: 20130114
Mar 9 16:10:26 localhost org.x.privileged_startx[22196]: font_cache: Updating FC cache
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: X11.app: DarwinProcessFDAdditionQueue_thread: Sleeping to allow xinitrc to catchup.
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: (EE) Error loading keymap /tmp/server-1.xkm
Mar 9 16:10:26 localhost [0x0-0x65065].org.x.X11[22183]: (EE) XKB: Failed to load keymap. Loading default keymap instead.
Mar 9 16:10:27 localhost [0x0-0x65065].org.x.X11[22183]: font_cache: Done
Mar 9 16:10:28 localhost [0x0-0x65065].org.x.X11[22183]: /usr/X11/bin/xinit: XFree86_VT property unexpectedly has 0 items instead of 1
Mar 9 16:10:28 localhost org.x.privileged_startx[22196]: font_cache: Done
Mar 9 16:10:40 localhost Inkscape[22119]: kCGErrorInvalidConnection: CGSGetWindowTags: Invalid connection
Mar 9 16:11:54 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx[22357]): posix_spawn("/opt/X11/lib/X11/xinit/launchd_startx", ...): No such file or directory
Mar 9 16:11:54 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx[22357]): Exited with code: 1
Mar 9 16:11:54 localhost com.apple.launchd.peruser.501[141] (org.macosforge.xquartz.startx): Throttling respawn: Will start in 10 seconds
Again, I'm not very knowledgable about computers and programming at all, so thanks very much for your reply! Also, I do have X11 but I'm not using Xquartz which I assume is the latest version. The first time I tried installing inkscape, I also downloaded and installed xquartz but I uninstalled both of them when nothing was happening.