I found that ssh -X user@remote_host
doesn’t do X-forwarding, and that is - I’m told - because the X11 server (XQuartz 1.20.4 (xorg-server 1.20.4) doesn’t have security extensions. $ xdpyinfo -queryExtensions name of display: /private/tmp/com.apple.launchd.NM3gWpA6AH/org.macports:0 version number: 11.0 vendor string: The X.Org <http://x.org/> Foundation vendor release number: 12004000 X.Org <http://x.org/> version: 1.20.4 maximum request size: 16777212 bytes motion buffer size: 256 bitmap unit, bit order, padding: 32, LSBFirst, 32 image byte order: LSBFirst number of supported pixmap formats: 7 supported pixmap formats: depth 1, bits_per_pixel 1, scanline_pad 32 depth 4, bits_per_pixel 8, scanline_pad 32 depth 8, bits_per_pixel 8, scanline_pad 32 depth 15, bits_per_pixel 16, scanline_pad 32 depth 16, bits_per_pixel 16, scanline_pad 32 depth 24, bits_per_pixel 32, scanline_pad 32 depth 32, bits_per_pixel 32, scanline_pad 32 keycode range: minimum 8, maximum 255 focus: None number of extensions: 21 Apple-DRI (opcode: 128, base event: 64, base error: 128) Apple-WM (opcode: 129, base event: 68, base error: 130) BIG-REQUESTS (opcode: 134) DAMAGE (opcode: 142, base event: 97, base error: 154) DOUBLE-BUFFER (opcode: 144, base error: 155) GLX (opcode: 148, base event: 101, base error: 159) Generic Event Extension (opcode: 130) MIT-SCREEN-SAVER (opcode: 143, base event: 98) MIT-SHM (opcode: 132, base event: 72, base error: 132) Present (opcode: 145) RANDR (opcode: 141, base event: 95, base error: 149) RENDER (opcode: 140, base error: 144) SHAPE (opcode: 131, base event: 71) SYNC (opcode: 135, base event: 90, base error: 138) X-Resource (opcode: 146) XC-MISC (opcode: 137) XFIXES (opcode: 139, base event: 93, base error: 142) XINERAMA (opcode: 138) XInputExtension (opcode: 133, base event: 73, base error: 133) XKEYBOARD (opcode: 136, base event: 92, base error: 141) XVideo (opcode: 147, base event: 99, base error: 156) default screen number: 0 number of screens: 1 screen #0: dimensions: 1680x1028 pixels (445x272 millimeters) resolution: 96x96 dots per inch depths (7): 24, 1, 4, 8, 15, 16, 32 root window id: 0x111 depth of root window: 24 planes number of colormaps: minimum 1, maximum 1 default colormap: 0x21 default number of colormap cells: 256 preallocated pixels: black 0, white 16777215 options: backing-store NO, save-unders NO largest cursor: 32x32 current input event mask: 0x1a0000 StructureNotifyMask SubstructureNotifyMask SubstructureRedirectMask number of visuals: 80 default visual id: 0x22 visual: visual id: 0x22 class: TrueColor depth: 24 planes available colormap entries: 256 per subfield red, green, blue masks: 0xff0000, 0xff00, 0xff significant bits in color specification: 8 bits Is there a way to make the server having these extensions? Or are there reasons standing against this? — Christoph
