I'd like to create a virtual monitor driver for OS X. What I mean by virtual is a monitor driver that does not drive an attached monitor, yet fools OS X into thinking there is such a monitor attached.
The purpose? It can tunnel display data to some other device over some other protocol, say VNC.
I believe this has been done before in one form or another (perhaps those apps that turn your iPad into a secondary display).
Any coding/kernel hackery pointers on this would be appreciated!
After days and days of attempts, I found http://code.google.com/p/ioproxyvideofamily/ which works like a charm. Tried EWProxyFramebuffer, tried iDisplay, but this is the first one that actually works!
- Update -
Sounds like ioproxyvideofamily hasn't been kept up to date with new OS's. I haven't tried it (or any alternatives) since 10.7. If you find a better alternative, create a new answer to this question.
https://github.com/mkernel/EWProxyFramebuffer can do what you want. You have to compile it with xcode yourself and to install EWProxyFrameBuffer.kext to /System/Library/Extensions and EWProxyFrameBufferConnection.framework to /System/Library/Frameworks. Make sure all rights of the installed files are 755 and owner/group is root/wheel. Using EWProxyFrameBuffer.app, you can then de-/activate the monitor.
I try to get http://code.google.com/p/ioproxyvideofamily/ working. Is it Lion or is it me? Because it doesn't show in System Information/Software/Extensions. Also the provided applications doesn't work.
I'm about to check out the source to see if there is something fishy in there.
Related
I've implemented an OSXFUSE-based file system. It works fine on 10.8, but on Mavericks MS Word opens existing documents as blank (although I am, apparently, returning the correct data - I see the contents in the preview icon. Also, if I copy a file to a real hard drive and open it, it opens fine).
This issue is fixed on Mavericks if I mount my filesystem with the "local" flag. However, using this flag introduces other problems - e.g., it looks like it causes Finder to do some more aggressive caching, hence some file are not visible in Finder (although I can ls them in terminal).
Ideally I want to be able to mount the filesystem without this local flag (my implementation stores file on the network, so passing this flag looks wrong), but the problem with blank Word documents really puzzles me.
We have been able to track down the problem to - wait for it - Google Chrome. When Google Chrome is running while the volume is mounted, the problem appears. If Google Chrome is not running, Word/Excel/etc. files open just fine.
We've been in contact with Benjamin (OSXFUSE developer). Please also see his answer regarding this issue on the OSXFUSE mailing list:
https://groups.google.com/d/msg/osxfuse-group/URlw-n-Qakg/bLw2fHHDe7sJ
So far I have not found any bugs in osxfuse that might explain this behavior. The odd thing is that the files are not corrupted or empty. After copying the files to another volume they open just fine. Using LibreOffice to open the file on the FUSE volume works, too.
Chrome and Office seem to be based on the Carbon framework (which is deprecated since Mountain Lion). I believe the issue is somehow related to Carbon since non-Carbon apps do not seem to be affected. Every time a volume is mounted Chrome queries the volume’s capabilities and attributes (and maybe more). As far as I can tell all these file system operations return successful without any errors. But from this point on Office will fail to open documents.
In my opinion the two most likely reasons for this are:
osxfuse might break the VFS file system contract on Mavericks. I’ve been looking into this for some time now but I have not found any clues supporting this.
There might be a bug in the Carbon/CarbonCore framework. The odd thing is that there are no issues when using the stock network file systems afp or smb.
The two possible "fixes" (or rather "workarounds") for this issue seem to be (for now):
Use the "local" mount option (which might introduce other problems and is generally not recommend to use)
Do not use the "volname" mount option. The problem seems only to occur when the "volname" mount option is used. If no custom volume name is set, the problem seems not to occur and Excel/Word/etc. files open just fine - regardless whether Google Chrome was running at mount time.
I've seen the same and likewise local is not an option. Similar problems with Photoshop.
Some findings from my implementation
The problem doesn't occur on first run after reboots.
The problem begins occurring after program exit.
I solved this problem by manually dismounting (and waiting a few seconds) before exiting my program. If unmount is successful, on next run the mount again performs fine.
If the program ever terminates or dismounting fails (file in use, etc) then the volume's read-access is borked in Word/Photoshop on next mount.
Rebooting resolves issue.
Does this match what you're seeing?
I believe this is similar to the thread: Canon SDK 2.11 on OSX
However the solution there did not work for me. I'm perplexed because I'm not sure how to figure out what has changed. I had some working software, did not work on it over the holiday and now when I open it up to work it fails. Not only my software but the demo app included with the SDK, which I have never changed and indeed used to work just fine.
I have tried with two different cameras (5DmII and 5DmIII) with the same result.
when I try and run the application, the camera is recognized but, as it attempts to open a session it receives a EXC_BAD_ACCESS signal. In each program it happens when a call is made to EdsOpenSession() with this message...
*** -[NSConcreteData release]: message sent to deallocated instance 0x8157af0
Interestingly, when I tried to use the EOS Utility that would crash also. So I updated and now that works great. I followed the suggestion in the above thread and copied the EDSDK.framework from the working bundle to my program and recompiled but I get the same results.
I'm trying to figure out how to contact Canon to get some information but they don't make it easy to get help so I'm appealing to the one group I know is responsive.
The only thing I can think is that sometime over the holiday I updated some critical library without knowing it.
Has anyone else run into and been able to solve this?
I'm running OS X 10.7.5, xcode 4.1, and EDSDK 2.11.3
Solved this. It did turn out to be the same solution as the mentioned link. However, what I was missing was that I needed to also copy the new EDSDK.framework into /Library/Frameworks not just have it in my source directory. This may be because I don't have everything setup correctly in XCode.
I tried to install windows7 from USB according to the instructions of following page.
http://www.intowindows.com/how-to-install-windows-7vista-from-usb-drive-detailed-100-working-guide/
But at the location where i select the partition it says me something like "device not found."(Cant give the exact machine as i came to somewhere else to search the internet, coz my machine's not working).
How can i overcome this?? I've formatted the whole disk. Got nothing to do now!!!
You have formatted the whole hard disk. That is the problem. It's a windows 7 specific problem. I'll describe the case in brief. the setup detects your pen drive as a part of the hard disk(at least something like this). Therefore you can overcome the issue by not letting this to happen.
Which means, you can make the pen drive read only (or make don't allow setup to use pen drives storage). One possible solution will be fill the empty space of the pen drive with bulky data. then there will be no space for the setup program to use in the pen.
Or else you can remove pen drive at the time where the setup is trying to access it (for the above mentioned purpose). How to know the exact time??? well it's trial and error. I myself have done it and it worked. It will require some Patience.
Of course, you can install some other os and then try install win7 after that.
Hope that helps..!!
I Used to change my Mac Adress in Open Networks with the command:
ifconfig eth0 ether 00:11:22:33:44:55
in iOS4 this was no Problem, i remember there was even an App on Cydia for that. For ifconfig i instaklled network-tools from BigBoss Source.
Since iOS5 the Command is going thru Terminal without any error, however the MAC-Address isnt changing anymore... Someone a Idea on how to change it?
It's possible. For some reason, spoofing it in iOS 5 won't work (either via command line or MacX4), but you could always rewrite it in hardware. There are several cons to this and this is not worth during unless you absolutely have to: it will break your music player (so you have to use VLC or the like), is permanent even after reboot, and effectively changes your UDID (so betas will not work and the device will be unregistered).
nvram wifiaddr="XX:XX:XX:XX:XX"
Again, the cons definitely outweigh the pros here. I'm sure eventually someone will come up with the software to do a spoof, not a total rewrite.
It can be done. My iPad running 5.01 has an arbitrary MAC. There are no restrictions as far as playing music, and I am still able to access Apple services (at least those that I use personally) without hindrance. It's a moderately tedious process, but after a bunch of failed attempts I was able to successfully (and permanently unless I decide to repeat the process using my originals) change the values with a combination of terminal commands, DFU/recovery cycles, OSX apps, and a clean restore via iTunes. If anyone is still interested, I would be willing to outline the process. I would do so now, but I have to hash out some specifics concerning the iTunes host file.
Because the MAC address is unchangeable for a reason?
Here is what I want to do:
I want to run Mathematica on another Mac from my Mac (both Snow Leopards). I want to do this because the remote Mac has multiple cores/processors while my local Mac is rather shabby. I would like to have the front end still locally (i.e. the graphical interface).
What I've learned:
I used to do this type of thing from multiple Linux machines and was expecting to have similar success for Mac-to-Mac operation. However no such luck.
The problem seems to be a display issue (front end).
Mac front end runs in Aqua while X11 is what is really needed (this is why there is no problem on Unix). While Macs have X11, for some reason Mathematica can't use it.
So how do I get around this issue?
Possible solutions that I have had to rule out are: 1. screen sharing. Not practical since someone else will be using the remote Mac on another account. Screen sharing only uses the active screen. 2. Installing Unix on the remote computer. Not possible in my situation.
Thanks.
You should be able to set up a remote kernel on the other Mac. This is done through the Evaluation > Kernel Configurations menu item. The you can set the remote kernel for a given notebook using Evaluation > Notebook's Kernel or globally via Evaluation > Default Kernel.
I haven't done this in a while, and it's sometimes useful to test things from a terminal with something like
ssh <user>#<remote.machine.com> </path/to/remote/Mathematica.app/Contents/MacOS/MathKernel>
Why not use the command line kernel? I have a script math which does:
#!/bin/bash
rlwrap /Applications/Mathematica.app/Contents/MacOS/MathKernel
I built rlwrap from source, but basically that tool gives you readline behaviors. You can just do
ssh remote-machine /Applications/Mathematica.app/Contents/MacOS/MathKernel
The only solution, I believe, is for you to upgrade to OS X Lion. It allows simultaneous screen sharing sessions where each user can control the screen for their own account:
http://www.apple.com/macosx/whats-new/features.html#screensharing