Question about firefox permissions for sites

i have a question about sites permissions
in google chrom it is easy to set permission for each site like (java, flash plugin, image , ...)
http://i58.tinypic.com/nl66v9.png
but i prefer to use firefox
is there any addon or something else to have this options in firefox ?

You can inspect and manage the permissions for the domain in the currently selected tab via these steps:
*Click the "[[Site Identity Button|Site Identity Button]]" (globe/padlock) on the location/address bar
*Click "More Information" to open "Tools > Page Info" with the Security tab selected
*Go to the Permissions tab (Tools > Page Info > Permissions) to check the permissions for the domain in the currently selected tab
You can inspect and manage the permissions for all domains on the <b>about:permissions</b> page.
*https://support.mozilla.org/kb/how-do-i-manage-website-permissions

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Question about Removing Permissions from the System Folder with chmod

Hi
I have a question about the removal of permissions from the System folder (and sub directories and files).
Background
Since installing a new HD, clean install of 10.6, application of updates and moving over backed up user directories I have had several issues with permissions.
I have read several threads on this and using disk warrior and other tools I have been able to fix most of the issues.
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OK
So I misread on the your instructions about the PW reset, did it, no harm in that. I did also select the options to reset all the permissions for all the accounts and the ACL issues were not resolved. My bad, I forgot to note that.
You do suggest getting and expert opinion but alas these are rather elusive. In most cases the Apple solutions is to do a complete reinstall... I have found that unless you completely wipe a drive and rebuild everything there are often artifacts left behind. Since I have full and redundant back-ups I would rather explore and hack a little instead of a dull old system reinstall. The irony is the system issue I had was it was the result a reinstall and combo update on a new drive. I recognize the risks of entering the realms of the System folders but I am willing to explore knowing full well that I have a path to recovery.
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Hi Eric55,
I want to suggest two things:
You yourself should use a non-admin account for daily
work. An administrator should administrate, and
should not write a letter. This would reduce risks of
malicious software doing bad things to your whole
system (since it would have your admin rights) and
you yourself doing bad things without noticing (like
deleting important files accidentically just because
you can do so without warning).
Many thanks for your very helpful reply. I can see the wisdom of what you're suggesting. So, should I just create another account, e.g., called "Eric2," that I use for routine work, leaving the "Eric" account that has admin rights alone except when needed for admin tasks?
Regarding your question with folder permission: There
is a folder named "Shared" that should hold all the
files that everyone needs to have access to. The
important bit is that the files in it must also be
available to everyone.
I had understood from the book I bought ("Mac OS X, The Missing Manual, Tiger Edition," by David Pogue) that all users have access to the Shared folder and its contents. In fact, this is how I got into this whole issue of folder permissions. Pogue's book suggests putting music (MP3) files into the Shared folder (rather than leaving them in each user's Music folder) so that all users can share them in iTunes (after switching the iTunes music folder location to the Shared. . . folder). I did this, but then my son, working from within his user account, was unable to copy the contents of a music CD into the Shared folder. That got me started on what seems to have been a misguided effort to expand folder permissions so that he (and other users) would have read & write access to the Shared folder, not just read only access.
But once I did that, the kids starting having problems with iTunes and iPhoto from their user accounts. For example, a common problem was that when trying to open iTunes they would get an error message saying that iTunes was on a locked disk or they didn't have permission to access the folder. This didn't make sense, since I thought I'd expanded their access rights sufficiently by putting them in a "family" group and giving that group R&W access. So at that point, I concluded that I didn't understand permissions well enough!
And for this a common group is
alright, but Mac OS does not do this automatically;
all files copied there must be changed manually (or
by a folder action Apple Script, if you know how to
do this) to this group and have the proper rights
set.
That's what I thought I'd done with my "family" group, but that seems to have created more problems that it solved.
BTW, I would not put admin or root users in this
common group, again out of caution.
OK, makes sense.
And user folders
should belong to users, not to everyone. Just my
thinking ...
Again, what I was basically trying to accomplish was to have all the music files in the Shared folder, but at the same time make it possible for individual users to add music to the Shared folder. Maybe you have some suggestions for how to do that, and for how to revise the permissions I set up, e.g., to put them back to how they were before. If so, many thanks in advance!
--Eric

I asked a question about Firefox, now where is it?

I asked a question on this forum about Firefox. How do I know if anyone answered it? Also, how do I find it again?

'''My Contributions''' at the top of the main forum pages should show you all your postings here, when you are logged into this forum.
There has been no answer posted. <br />
https://support.mozilla.com/en-US/questions/806634?s=&as=s

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As I struggle with instability and numerous application crashes in Leopard, I'm trying to exhaust all troubleshooting opportunities, wondering if maybe it's a disk permissions/access issue that's causing my problems.
I have two large SATA drives in an enclosure, in addition to two higher rpm internals, one for the system and apps exclusively, and the other as a dedicated scratch disk for Adobe products. I use the one large disk for document and job storage (literally everything I work on and save), and the other for TimeMachine backup. The permissions on the drives in the enclosure read:
Me - Read & Write
staff - Read & Write
everyone - Read only
and this is carried through the contents.
When I look at the drive that the SYSTEM is on, the permissions are set as follows, when I Get Info on the hard drive icon:
(unknown) - Read & Write
Me - Read & Write
(unknown) - Read only
everyone - Read only
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The next question is, on the hard drives, does this (unknown) user, or its double, need to be set up with some kind of permission? Since I'm working with various applications, particularly Adobe CS3, I wonder if as I'm working, the apps need to call for some special access to my files that they're not getting. Could that be why I'm crashing?
And yet, I've repaired permissions on those volumes too.

Hey Scott,
On the Leopard installation, the only user accounts are me and root.
Results from the terminal:
POWERMACG5:~ thalo$ id
uid=501(thalo) gid=20(staff) groups=20(staff),98(lpadmin),81(_appserveradm),101(com.apple.sharepoint.group.1),79(appserverusr),80(admin)
POWERMACG5:~ thalo$ ls -al /
total 41389
drwxr-xr-x+ 33 root admin 1190 Mar 6 12:44 .
drwxr-xr-x+ 33 root admin 1190 Mar 6 12:44 ..
-rw-r--r--@ 1 thalo 501 12292 Mar 12 18:56 .DS_Store
drwx------ 3 root 501 102 Feb 15 01:44 .Spotlight-V100
drwxrwxrwt@ 3 thalo admin 102 Feb 15 09:26 .TemporaryItems
d-wx-wx-wt 2 root staff 68 Feb 16 20:10 .Trashes
-rw-r--r-- 1 root 501 0 Feb 15 01:44 .com.apple.timemachine.supported
drwx------ 4 root staff 136 Mar 13 12:39 .fseventsd
-rw------- 1 root wheel 131072 Feb 23 20:07 .hotfiles.btree
drwxr-xr-x@ 2 root wheel 68 Sep 24 03:08 .vol
drwxrwxr-x+ 108 root admin 3672 Mar 11 17:25 Applications
-rw-r--r--@ 1 root admin 48640 Mar 12 16:20 Desktop DB
-rw-r--r--@ 1 root admin 2 Feb 15 23:47 Desktop DF
drwxrwxr-t+ 54 root admin 1836 Feb 29 00:48 Library
drwxr-xr-x@ 2 root wheel 68 Sep 23 17:37 Network
drwxr-xr-x 4 root wheel 136 Feb 15 02:47 System
drwxr-xr-x 5 root admin 170 Feb 15 02:25 Users
drwxrwxrwt@ 7 root admin 238 Mar 13 13:28 Volumes
drwxr-xr-x@ 40 root wheel 1360 Feb 15 02:44 bin
drwxrwxr-t@ 2 root admin 68 Sep 23 17:37 cores
dr-xr-xr-x 2 root wheel 512 Mar 13 12:38 dev
lrwxr-xr-x@ 1 root admin 11 Feb 15 01:51 etc -> private/etc
dr-xr-xr-x 2 root wheel 1 Mar 13 12:39 home
-rw-r--r--@ 1 root wheel 10272820 Feb 5 19:15 mach_kernel
-rw-r--r--@ 1 root wheel 10696809 Oct 10 00:38 mach_kernel.ctfsys
dr-xr-xr-x 2 root wheel 1 Mar 13 12:39 net
drwxr-xr-x@ 7 root wheel 238 Feb 15 02:56 private
drwxr-xr-x@ 66 root wheel 2244 Feb 15 02:44 sbin
lrwxr-xr-x@ 1 root admin 11 Feb 15 01:51 tmp -> private/tmp
drwxr-xr-x@ 11 root wheel 374 Feb 15 02:45 usr
lrwxr-xr-x@ 1 root admin 11 Feb 15 01:51 var -> private/var
POWERMACG5:~ thalo$ ls -al /
total 48
drwxrwxr-x+ 108 root admin 3672 Mar 11 17:25 .
drwxr-xr-x+ 33 root admin 1190 Mar 6 12:44 ..
-rw-r--r-- 1 thalo 501 21508 Mar 12 13:16 .DS_Store
-rw-rw-r-- 1 root admin 0 Sep 23 20:43 .localized
drwxrwxr-x@ 4 thalo admin 136 Feb 16 01:47 AOL
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Address Book.app
drwxrwxr-x@ 6 root admin 204 Feb 15 03:12 Adobe Acrobat 8 Professional
drwxrwxr-x@ 12 root admin 408 Feb 15 03:19 Adobe After Effects CS3
drwxrwxr-x@ 8 root admin 272 Feb 15 03:07 Adobe Bridge CS3
drwxrwxr-x@ 7 root admin 238 Feb 15 03:15 Adobe Contribute CS3
drwxrwxr-x@ 27 root admin 918 Feb 16 00:43 Adobe Device Central CS3
drwxrwxr-x@ 11 root admin 374 Feb 15 03:16 Adobe Dreamweaver CS3
drwxrwxr-x 4 root admin 136 Feb 15 03:13 Adobe Encore CS3
drwxrwxr-x@ 8 root admin 272 Feb 15 03:11 Adobe Extension Manager
drwxrwxr-x@ 10 root admin 340 Feb 19 17:37 Adobe Fireworks CS3
drwxrwxr-x@ 12 root admin 408 Mar 3 00:10 Adobe Flash CS3
drwxrwxr-x@ 6 root admin 204 Feb 15 03:14 Adobe Flash CS3 Video Encoder
drwxrwxrwx@ 9 root admin 306 Feb 16 00:58 Adobe GoLive 9
drwxrwxr-x 3 root admin 102 Feb 15 03:13 Adobe Help Viewer 1.0.app
drwxrwxr-x@ 4 root admin 136 Feb 16 00:56 Adobe Help Viewer 1.1.app
drwxrwxr-x@ 10 root admin 340 Feb 16 20:17 Adobe Illustrator CS3
drwxrwxr-x@ 12 root admin 408 Feb 16 00:47 Adobe InDesign CS3
drwxrwxr-x@ 14 root admin 476 Feb 17 17:18 Adobe Photoshop CS3
drwxrwxr-x@ 6 root admin 204 Feb 15 03:14 Adobe Premiere Pro CS3
drwxrwxr-x@ 5 thalo 501 170 Feb 17 18:02 Adobe Reader 8
drwxrwxr-x 4 root admin 136 Feb 15 03:14 Adobe Soundbooth CS3
drwxrwxr-x@ 4 root admin 136 Feb 15 03:10 Adobe Stock Photos CS3
drwxrwxr-x@ 4 thalo admin 136 Feb 17 03:39 Alien Skin
drwxrwxr-x 3 root admin 102 Mar 4 07:53 Aperture.app
drwxrwxr-x 6 root admin 204 Feb 15 01:54 AppleScript
drwxr-xr-x 3 502 502 102 Oct 26 15:29 Autodesk
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Automator.app
drwxrwxr-x@ 3 thalo admin 102 Dec 17 10:12 BBEdit.app
drwxr-xr-x@ 6 thalo staff 204 Feb 26 09:00 Barcode Producer
drwxrwxr-x 3 root admin 102 Oct 10 21:19 Calculator.app
drwxrwxr-x@ 3 thalo admin 102 Feb 15 08:23 Cocktail.app
drwxr-xr-x 3 thalo admin 102 Jun 22 2006 Comic Life.app
drwxrwxr-x 3 root admin 102 Feb 15 02:45 DVD Player.app
drwxr-xr-x@ 10 thalo admin 340 Feb 28 15:50 Dark Castle 3 ƒ
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Dashboard.app
drwxr-xr-x 3 thalo 501 102 Mar 13 2006 DeepVacuum.app
drwxr-xr-x 6 thalo staff 204 Feb 27 00:38 Developer Tools
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Dictionary.app
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Expose.app
drwxrwxrwx@ 11 thalo staff 374 Feb 16 02:00 Extensis Suitcase Fusion
drwxr-xr-x@ 3 thalo admin 102 Nov 9 15:39 Fetch.app
drwxr-xr-x 6 thalo admin 204 Feb 10 2007 File Buddy 9
drwxr-xr-x@ 8 thalo 501 272 Jan 31 2007 Final Draft 7
drwxr-xr-x@ 3 thalo admin 102 Sep 10 2006 Firefox.app
drwxrwxr-x 6 root admin 204 Feb 21 00:27 Flip4Mac
drwxrwxr-x 3 root admin 102 Jun 19 2007 Font Book.app
drwxr-xr-x@ 5 thalo staff 170 Feb 9 08:37 Font Finagler 1.0
drwxr-xr-x@ 8 thalo admin 272 Dec 18 15:34 FontDoctor X for Macintosh
drwxrwxr-x 3 root admin 102 Oct 10 01:03 Front Row.app
drwxrwxr-x 3 root admin 102 Mar 4 07:53 GarageBand.app
drwxr-xr-x 3 root admin 102 Feb 16 22:11 Garmin WebUpdater.app
drwxrwxr-x 3 thalo admin 102 Nov 14 14:19 Google Earth.app
drwxrwxr-x 3 root admin 102 Feb 20 12:00 Gordon.app
drwxrwxr-x 3 root admin 102 Sep 24 01:58 Image Capture.app
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Mail.app
drwxr-xr-x@ 3 thalo staff 102 Feb 6 09:33 MenuCalendarClock iCal.app
drwxrwxr-x 9 root admin 306 May 27 2007 MenuMachine 2
drwxrwxrwx@ 16 thalo admin 544 Feb 16 02:13 Microsoft Office 2004
drwxr-xr-x@ 14 thalo 501 476 Jun 14 2007 PanoramaMaker
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Photo Booth.app
drwxr-xr-x@ 4 thalo admin 136 Jan 25 07:39 PreMinder.app
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Preview.app
drwxrwxrwx@ 20 thalo admin 680 Feb 2 07:27 QuarkXPress 6.5
drwxr-xr-x 3 thalo admin 102 Jan 4 14:49 QuicKeys.app
drwxr-xr-x@ 5 thalo 501 170 Apr 2 2005 QuickBooks NUE
drwxrwxr-x 3 root admin 102 Feb 15 02:45 QuickTime Player.app
drwxrwxrwx@ 8 thalo admin 272 Aug 6 2005 Roxio Toast 6 Titanium
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Safari.app
drwxrwxrwx 7 thalo 501 238 Feb 17 02:11 Silo
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Spaces.app
drwxrwxr-x 3 root admin 102 Sep 24 00:53 Stickies.app
drwxrwxr-x@ 11 thalo admin 374 Feb 17 14:39 Strata 3D CX 5.5
drwxrwxr-x@ 13 thalo admin 442 Feb 17 16:55 Strata Design 3D[in]
drwxrwxr-x@ 9 thalo admin 306 Feb 17 17:06 Strata Foto 3D
drwxrwxr-x@ 12 thalo admin 408 Feb 17 17:00 Strata Foto 3D[in]
drwxrwxrwx 22 thalo 501 748 Feb 17 18:09 Strata Live 3D
drwxrwxr-x 15 thalo 501 510 Feb 17 17:15 Strata Live 3D PDF
drwxrwxr-x@ 10 thalo admin 340 Feb 17 17:36 Strata Live 3D[in]
drwxr-xr-x 10 thalo admin 340 Feb 18 10:09 Strata RenderPro
drwxr-xr-x@ 11 thalo admin 374 Nov 8 18:38 StuffIt 12
drwxrwxr-x@ 10 thalo admin 340 Feb 25 23:41 SuperCard 4.6.2 Trial
drwxr-xr-x@ 6 thalo staff 204 Feb 25 22:40 SuperCard® 4.5.2 Player
drwxrwxr-x 3 root wheel 102 Oct 8 22:02 System Preferences.app
drwxr-xr-x@ 4 thalo staff 136 Feb 27 23:37 TechTool Pro 4.app
drwxrwxr-x 3 root admin 102 Sep 24 00:52 TextEdit.app
drwxrwxrwx@ 11 thalo admin 374 Nov 6 2003 Thoth
drwxrwxr-x 3 root admin 102 Feb 15 02:45 Time Machine.app
drwxr-xr-x 3 thalo admin 102 Feb 14 05:36 TinkerTool.app
drwxrwxr-x+ 31 root admin 1054 Mar 11 20:48 Utilities
drwxr-xr-x 3 root wheel 102 Feb 16 01:19 VPNClient.app
drwxr-xr-x@ 5 thalo staff 170 Mar 10 18:45 Version 22u
drwxrwxr-x@ 8 thalo staff 272 Mar 1 18:56 Windows Media Player
drwxrwxrwx 8 thalo admin 272 Feb 16 20:28 games
drwxrwxr-x 3 root admin 102 Feb 15 02:45 iCal.app
drwxrwxr-x 3 root admin 102 Feb 15 02:45 iChat.app
drwxrwxr-x 3 root admin 102 Feb 22 15:30 iDVD.app
drwxrwxr-x 4 root admin 136 Feb 22 15:24 iMovie (previous version).localized
drwxrwxr-x 3 root admin 102 Feb 24 22:21 iMovie.app
drwxrwxr-x 3 root admin 102 Feb 29 00:48 iPhoto.app
drwxrwxr-x 3 root admin 102 Feb 15 02:45 iSync.app
drwxrwxr-x 3 root admin 102 Feb 21 22:48 iTunes.app
drwxrwxr-x 3 root admin 102 Feb 24 22:21 iWeb.app
drwxrwxrwx 12 thalo staff 408 Feb 17 05:43 vlc-0.8.6d
POWERMACG5:~ thalo$ ls -al ~/
total 64
drwxr-xr-x+ 20 thalo staff 680 Mar 13 12:39 .
drwxr-xr-x 5 root admin 170 Feb 15 02:25 ..
-rw------- 1 thalo staff 3 Feb 15 02:25 .CFUserTextEncoding
-rw-r--r--@ 1 thalo staff 12292 Mar 13 12:17 .DS_Store
drwx------ 2 thalo staff 68 Mar 13 12:39 .Trash
drwxr-x--x 3 thalo staff 102 Feb 18 18:24 .adobe
-rw------- 1 thalo staff 82 Mar 10 08:02 .bash_history
drwx------ 3 thalo staff 102 Feb 16 21:55 .cups
-rwxr-----@ 1 thalo staff 177 Feb 16 01:24 .login
-rwxr-----@ 1 thalo staff 181 Feb 16 01:24 .profile
drwx------+ 24 thalo staff 816 Mar 13 12:27 Desktop
drwx------+ 13 thalo staff 442 Mar 9 23:41 Documents
drwx------+ 4 thalo staff 136 Mar 12 19:16 Downloads
drwx------+ 49 thalo staff 1666 Mar 13 15:28 Library
drwx------+ 3 thalo staff 102 Feb 15 02:25 Movies
drwx------+ 5 thalo staff 170 Feb 15 09:19 Music
drwx------+ 26 thalo staff 884 Mar 6 19:51 Pictures
drwxr-xr-x+ 6 thalo staff 204 Mar 2 11:57 Public
drwxr-xr-x+ 5 thalo staff 170 Feb 15 02:25 Sites
drwxr-xr-x 3 thalo staff 102 Feb 23 12:19 StuffIt

Question about CPU usage for video playback

I've asked a related question already on the Safari forum, but would like some clarification, please.
The speed of this iMac is 400 MHZ and whenever I go to YouTube or almost any other site that requires video I see that the CPU usage can peak way up at 80% or more. I have Flash 9 installed which has a minimum of 500 MHZ, so I get pretty choppy video, but that's not the issue here. I can live with that. I keep any other applications closed. I'm often running a small fan over the top of the iMac to help vent the buildup of heat. I can monitor the temperature at the Hard Drive and I suppose that gives me an idea, of sorts, about general temperature conditions inside.
The answer I got was that this kind of CPU usage could be detrimental to the processor as it builds up excessive heat and to keep this kind of video to a minimum.
My question is can anyone roughly suggest what a maximum time on YouTube, for example, would be, 2 minutes, 5 minutes, is 10 minutes too long? I have plenty of RAM at 768. Some guidelines?
Thanks.

Hey WZZZ,
Thanks for the star and kind words.
I'm the de facto Mac guy at my kids' school and we have around 25 iMac Slot Loaders working there. You can imagine they get abused quite a bit. There are 10 running Garage Band in the Music Department. That puts a tremendous strain on the CPU and I'm actually surprised that they run it so well. My son had a 600 iMac running GarageBand, he was complaining that it was getting jumpy and when I looked at it he was running 10 unlocked tracks simultaneously! So now he has an eMac G4 800 and that of course runs a lot better.
So to sum up, with all the abuse of those machines in terms of the CPUs the problems I have with them have nothing to do with that. The problems have more to do with parts of the OS that they toss, headphone jacks abused, CDs jammed in the slots, and the like.
A couple of other related things. I've got Hardware Monitor, demo, installed and I think it reported it could only find the hard drive sensor, if I'm not mistaken - nothing else on this Mac with a sensor. Is that right?
I see references to CPU sensors on 400 iMacs but on the 400 I have here for repair Temperature Monitor reports no sensors. Perhaps there were different versions of the 400.
But very good to hear that the fan is a good idea for CRT related things. Should I keep the fan running-mostly for that hard core CRT stuff- even if the computer is sleeping and the room temp. is only around 62-64 F.? (We need to put on warm clothes to sit in front of this thing now, but worth it to keep this old machine happy).
On the one I did the fan pushed the airflow in the direction of the passive flow of the iMac - in at the bottom and out the grill by the handle.
One more question, more out of curiosity than anything else: If I move this small clip-on fan close to the case - right now it's about 3 feet away and the image is stable - the screen begins to flicker and flutter quite a lot. My theory is that that's happening not necessarily because of electro-magnetic interference from the fan motor, but rather, because the back of the tube is getting cooled unevenly. What do you think?
Well the classic failures that I see in the iMac are in this order:
1) Dielectric breakdown of the flyback transformers internal insulation. This is heat/age related and a common problem with CRTs in general.
2) Breakdown of high voltage electolytic capacitors and regular high voltage capacitors on the neck board and PAV supply.
3) Solder problems with the flyback itself. This is diagnosed by the upside down boot technique.
I used to repair these problems but now it's easier for me to swap the Firewire boards into working 350s. I've got 12 of those in the basement currently.
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Question about Firefox CSS

-When I set the background colour of text in firefox,
it seems to adjust the lineheight slightly, adding
a coloured line above the text when it is highlighted.
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http://support.mozilla.com/en-US/chat
be active and working again?

A good place to ask questions and advice about web development is at the mozillaZine Web Development/Standards Evangelism forum.
The helpers at that forum are more knowledgeable about web development issues.
You need to register at the mozillaZine forum site in order to post at that forum.
See http://forums.mozillazine.org/viewforum.php?f=25

Question about AirPort card for older system

I have an iMac G5 with OSX 10.3.9. I need to get an AirPort card to install in it, and the local Apple store tech says they don't carry it for that system, and I need to go online and order it using my serial number. The only card I can seem to find on the Apple site is the newer AirPort card that is not compatible. Can anyone guide me in the right direction of how to order what I need on the Apple site by using my serial number to ensure I get the right card?

Some if not most of the information you seek could
be available through this service self-help page;
but the parts may also be harder to get The main
phone number to the Apple Store (not a local) is
also a place to contact to inquire about getting a
replacement or original part for a Macintosh.
Your computer likely uses the now discontinued
but probably available AirPort Extreme card aka:
"Optional AirPort Extreme card (802.11b/g)"
{Some iMac G5s were different, and those had
a "built-in" AirPort Extreme Card (802.11b/g;
so if these failed, they required someone to go
into the computer and remove a part off the
main logic board and replace it with another.}
When a part proves to be no longer available
through the Apple Store directly or online,
you may be directed to look elsewhere to see
if one exists in the resale market.
In the meantime, you should be able to put
a serial number in a box as directed in the
following page's linked 'online assistant' to
get to the area where parts you could install
may be listed. Some of the computers are
not readily user-updated and so a part in
one model may not be user installed where
in another model it was user installable.
Use this link:
http://www.apple.com/support/serviceassistant/overview.html
To go here:
https://selfsolve.apple.com/GetWarranty.do
{If this system won't let you go into replacement parts
and a way to order them (such as RAM upgrade, w-fi
Airport card, etc) you may have to call the Store's # as
shown in the online store's web page & ask about it.}
Hopefully the part is a user installed item; I no
longer have the iMac G5 Service Manual in PDF;
or I could look it up, with part number, in detail.
For more definition in questions regarding your Mac
you could cite more exact model information; as it
appears on your computer's build data outside on
the case and in the System Profiler. Also, a free
database you can download for offline use is
available from http://mactracker.ca ...
Good luck & happy computing!
edited.

PXI 2527 & PXI 4071 -Questions about EMF considerations for high accuracy measurements and EMF calibration schemes?

Hi!
I need to perform an in-depth analysis of the overall system accuracy for a proposed system. I'm well underway using the extensive documentation in the start-menu National Instruments\NI-DMM\ and ..\NI-Switch\ Documenation folders...
While typing the question, I think I partially answered myself while cross-referencing NI documents... However a couple of questions remain:
If I connect a DMM to a 2 by X arranged switch/mux, each DMM probe will see twice the listed internal "Differential thermal EMF" at a typical value of 2.5uV and a max value of less than 12uV (per relay). So the total effect on the DMM uncertainty caused by the switch EMF would be 2*2.5uV = 5uV? Or should these be added as RSS: = sqrt(2.5^2+2.5^2) since you can not know if the two relays have the same emf?
Is there anything that can be done to characterize or account for this EMF (software cal, etc?)?
For example, assuming the following:
* Instruments and standards are powered on for several hours to allow thermal stability inside of the rack and enclosures
* temperature in room outside of rack is constant
Is there a reliable way of measureing/zeroing the effect of system emf? Could this be done by applying a high quality, low emf short at the point where the DUT would normally be located, followed by a series of long-aperture voltage average measurements at the lowest DMM range, where the end result (say (+)8.9....uV) could be taken as a system calibration constant accurate to the spec's of the DMM?
What would the accuracy of the 4071 DMM be, can I calculate it as follows, using 8.9uV +-700.16nV using 90 days and 8.9uV +- 700.16nV + 150nV due to "Additional noise error" assuming integration time of 1 (aperture) for ease of reading the chart, and a multiplier of 15 for the 100mV range. (Is this equivalent to averaging a reading of 1 aperture 100 times?)
So, given the above assumptions, would it be correct to say that I could characterize the system EMF to within 8.5uV+- [700.16nV (DMM cal data) + 0.025ppm*15 (RMS noise, assuming aperture time of 100*100ms = 10s)] = +-[700.16nV+37.5nV] = +- 737.66nV? Or should the ppm accuracy uncertainties be RSS as such: 8.5uV +- sqrt[700.16nV^2 + 37.5nV^2] = 8.5uV +-701.16nV??
As evident by my above line of thought, I am not at all sure how to properly sum the uncertainties (I think you always do RSS for uncertainties from different sources?) and more importantly, how to read and use the graph/table in the NI 4071 Specifications.pdf on page 3. What exactly does it entail to have an integration time larger than 1? Should I adjust the aperture time or would it be more accurate to just leave aperture at default (100ms for current range) and just average multiple readings, say average 10 to get a 10x aperture equivalent?
The below text includes what was going to be the post until I think I answered myself. I left it in as it is relevant to the problem above and includes what I hope to be correct statements. If you are tired of reading now, just stop, if you are bored, feel free to comment on the below section as well.
The problem I have is one of fully understanding part of this documenation. In particular, since a relay consists of (at least) 2 dissimilar metal junctions (as mentioned in the NI Switch help\Fundamentals\General Switching Considerations\Thermal EMF and Offset Voltage section) and because of the thermo-couple effect (Seebeck voltage), it seems that there would be an offset voltage generated inside each of the relays at the point of the junction. It refeers the "Thermocouple Measurements" section (in the same help document) for further details, but this is where my confusion starts to creep up.
In equation (1) it gives the expression for determining E_EMF which for my application is what I care about, I think (see below for details on my application).
What confuses me is this: If my goal is to, as accurately as possible, determine the overall uncertainty in a system consisting of a DMM and a Switch module, do I use the "Differential thermal EMF" as found in the switch data-sheet, or do I need to try and estimate temperatures in the switch and use the equation?
*MY answer to my own question:
By carefully re-reading the example in the thermocouple section of the switch, I realized that they calculate 2 EMF's, one for the internal switch, calculated as 2.5uV (given in the spec sheet of the switch as the typical value) and one for the actual thermocouple. I say actual, because I think my initial confusion stems from the fact that the documenation talks about the relay/switch junctions as thermocouples in one section, and then talks about an external "probe" thermocouple in the next and I got them confused.
As such, if I can ensure low temperatures inside the switch at the location of the junctions (by adequate ventilation and powering down latching relays), I should be able to use 2.5uV as my EMF from the switch module, or to be conservative, <12uV max (from data sheet of 2527 again).
I guess now I have a hard time believeing the 2.5uV typical value listed.. They say the junctions in the relays are typically an iron-nickel alloy against a copper-alloy. Well, those combinations are not explicitly listed in the documenation table for Seebeck coefficients, but even a very small value, like 0.3uV/C adds up to 7.5uV at 25degC. I'm thinking maybe the table values in the NI documentation reffers to the Seebeck values at 25C?
Project Engineer
LabVIEW 2009
Run LabVIEW on WinXP and Vista system.
Used LabVIEW since May 2005
Certifications: CLD and CPI certified
Currently employed.

Seebeck EMV needs temperature gradients , in your relays you hopefully have low temperature gradients ... however in a switching contact you can have all kind diffusions and 'funny' effects, keeping them on same temperature is the best you can do.
Since you work with a multiplexer and with TCs, you need a good Cold junction ( for serious calibrations at 0°C ) and there is the good place for your short cut to measure the zero EMV. Another good test is loop the 'hot junction' back to the cold junction and observe the residual EMV. Touching (or heating/cooling) the TC loop gives another number for the uncertainty calculation: the inhomogeneous material of the TC itself..
A good source for TC knowledge:
Manual on the use of thermocouples in temperature measurement,
ASTM PCN: 28-012093-40,
ISBN 0-8031-1466-4
(Page1): 'Regardless
of how many facts are presented herein and regardless of the percentage
retained,
all will be for naught unless one simple important fact is
kept firmly in mind.
The thermocouple reports only what it "feels."
This may or may not the temperature of interest'
Message Edited by Henrik Volkers on 04-27-2009 09:36 AM
Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

I have a question about the downloads for CS4.

I had to go back to CS4 Master Suite after my card was deactivated, because adobe got hacked and my credit card was compromised. Since I was in the middle of traveling and I'm still in a bad situation, because of it I am still on CS4. Which sucks for my workflow now.
Well, anyway... Sorry, still very frustrated.
When all that happened I had to download CS4 Master Suite from your site, because the disks are not with me. Photoshop continuously shutdown on me. If I attempt to move a layer up or down in the layers panel it froze and shutdown every freaking time. After Effects and Premier Pro could not export or render anything. Illustrator did what it's supposed to do most of the time. Photoshop, Illustrator, After Effects, and Premiere Pro are the only programs I use really. They are essential to my freelance work and I have had to turn away projects ever since this whole ordeal started last year.
About a month ago removed CS4 and downloaded Creative Cloud again, because I thought I was in a place were my bank could send me a card. Some how I received another monthly trial and everything was awesome again while I waited for my card. My card didn't come. The trial ended and now I'm right back to not being able to integrate with Cinema 4D and so on. Now that is not your fault. So, I'm not going there.
I did, once again, download the install file for CS4 Master Suite and install the same programs. They are just as problematic as they were the first time I used the .dmg file from your downloads site.
Now I know you are far away from CS4, but that is what I am on until I can get back to the US and get another card, because you don't accept paypal or anything else.
Is there anyway I can get an actual proper working install of CS4. I can work around all the features I lost if I can get a download that actually has everything it's supposed to have in it. I do not pirate software, which is why I went backwards. So, please, please, please, please do something about that .dmg that doesn't have everything need to make the program work properly.
Thank You,
From

Your technical issues have zero to do with the installers. Whatever is at play is rooted on your system, but you have not provided any specific system info nor crash logs. Pardon me, but "Photoshop is crashing" is a useful as my 88 year old grandma telling me her phone doesn't work...
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