I cannot open xls files on my Imac in preview or numbers where as I used to be able to

I am no longer able to open XLS files on my Imac. I was able to do it with preview or number & it will start to load & stop "progress"
Thank you

I opened one of the PDF files in notepad and these are the first couple lines:
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Cannot Open .xls files in Excel 2010

Before we start, I would just like to say, I've read probably 9 or 10 other threads with no help.
I cannot open any .xls file. Unfortunately the user has already associated the file type with Adobe Reader, so I cannot just double click the files to open them. I have tried the follow fixes with no solution:
-Open With .. > EXCEL.exe (I double click the application and nothing happens)
-Going in to the file extensions page and associating it with the EXCEL.exe application there, but same thing, nothing happens
-I have tried going into the registry and renaming the "OFFICE12"'s to "OFFICE14". Nothing happened
-I have tried going into the Excel folder options and checking off and unchecking "Ignore Other Applications That Use DDE"
-I have searched for the "Microsoft Application Virtualization DDE Launcher" application with no luck
of finding it
-I have tried re-installing and repairing Office 2010
I'm out of idea and have no idea what to try next. Any ideas?

Hi,
The registry key which could affect you open the .xls by double click is the following:
Important
This method is related to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you do it carefully. For added protection, back up the registry before you modify it. Then, you can restore
the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 (http://support.microsoft.com/kb/322756) How to back up and restore the registry in Windows
HKEY_CLASSES_ROOT\Excel.Sheet.8
I would suggest you rename the registry key, and then repair the Office programs to create a new key.
For example:
Rename “Excel.sheet.8” to “Excel.sheet.8.old”.
Then repair the Office programs:
Start > Control Panel > Programs and Features > click the Office 2010 program that you want to repair, then click Change > Repair > Continue.
You might need to restart your computer after the repair is complete.
Sincerely
Rex Zhang
Rex Zhang
TechNet Community Support

Cannot open older files (OS9) in iMac

My older Mac is a G3 blue and white with OS9. The monitor broke. I have now a iMac since a while.
My ancient files are in the iMac 2007 but I cannot open the psd or illustrator files.
I know there was Rosetta, is it still available ?
Thank you very much.
Alain Antoine

https://discussions.apple.com/docs/DOC-6271 explains your options for Rosetta.
Your iMac thankfully is compatible with Rosetta, but not with Classic. What that means is entirely new versions of your Illustrator and PSD applications. http://www.roaringapps.com/ may list versions of those applications that are compatible with Mac OS X 10.4 which you can install on the Blue and White G3. But you will need to update the firmware on the G3, get a new PRAM battery if it hasn't been updated in the last 4 years, and probably once you have imported the data into a new compatible version with Mac OS X, get a Parallel ATA Firewire case from http://www.macsales.com/ to take your internal drive of the Blue and White G3, and connect it to your iMac. Here's how to update the firmware:
https://discussions.apple.com/docs/DOC-2125

How to open xls files in Mountain Lion

I upgraded to Mountain Lion and now cannot open xls files. xlsx files open fine. Is there a way to convert the xls files?

I think I have the same issue. I had xls associated with Openoffice but after upgrading xls opens with Preview. I tried to change it using CMD+I but when I select Openoffice it returns to Preview.... And yes I also tried to change the extention into xlsx but that also didn't solve the issue

My Adobe Reader has a coded message that says Western Europen. I cannot open a file on my Pearson M

My Adobe Reader has a coded message that says wester Euopen. I cannot open a file on my PearsonMyITLab.

https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox
https://support.mozilla.com/en-US/kb/Opening+PDF+files+within+Firefox

Cannot open .xls or .doc files

I have office 2008 updated to the latest version operating on a mac osx 10.5.8. I cannot open xls or doc files. I get the messages "file cannot be opened" and "file blocked".
Have tried
- opening via right click and through the programs themselves
- installing updates
Any suggestions welcome.

Hello,
This forum is for troubleshooting Apple Software Update for Windows, a software package for Windows designed to update Apple products that run on Windows, and not related to Microsoft Office. Please post Office related questions on Microsoft's own forums for their Mac products.
http://www.officeformac.com/productforums
Good luck...

I have an iMac and cannot open PDF files in Firefox now. How do I fix this please?

I have an iMac and cannot open PDF files while working in my university site in Firefox now. How do I fix this please?

I have a similar problem - not mac related and sometimes I find if I download the pdf file I can open it then.

I have office 2004 on my Imac. Cannot open .xlsx files. Anyone know of a patch for this

I have office 2004 on my Imac. Cannot open .xlsx files. Anyone know of a patch for this

Mac users using Word 2004 who receive a Word 2008 for Mac, (or Word 2007 for Windows) document, will not be albe to read this without having the Open XML Converter installed, which can be downloaded from Microsoft.
Go to this page:
http://www.microsoft.com/mac/downloads.mspx
and click on the right under Most Popular, 'Open XML File Format Converter for Mac 1.0.2'
This opens a window at the bottom of the page. Scroll that to the bottom and click on English.dmg, and it will download for you as a disk image, which can be installed in the usual way.
After installation you can open and read .xml formatted Word 2008 documents in Word 2004.
Update: This link http://support.microsoft.com/kb/976831 takes you to a newer version 1.1.3 (released Nov 10, 2009).

QuickTime cannot open the file: "trampoline.mov"

I just got a new 2.1 GHz Power PC G5 iMac with 2.5 GB RAM, 500 GB HD running Tiger 10.4.5. I used migration assistant to transfer over all my apps. etc. from my PowerBook. I tried to open Quicktime (version 7.0.1) and I got this error "QuickTime cannot open the file: "trampoline.mov". I have no idea what this means or what it is referring to. I have no knowledge of the file "trampoline.mov". I am also getting "Can not build a preview because of a problem w/Quicktime" when I try to save a document in Photoshop CS2. It appears to save the document, and the error disappears. Once, however, I left the error message up on the screen for a few minutes, and I got a "generating preview" message that appeared underneath the error. It got stuck roughly in the middle of generating the preview, and I had to force quit the application. I would appreciate any help or advice on fixing this problem. Thank you, Regina
2.1 GHz Power PC G5 iMac with 2.5 GB RAM, 500 GB HD Mac OS X (10.4.5)

Upgrade QuickTime to version 7.0.4 and your troubles may disappear.
The trampoline.mov file is part of the QuickTime Player app and is used to "bounce" you to the Internet. Remove the check mark to "Show Content Guide" when QuickTime Player is launched (Player preferences).
I don't know why you're getting a QT error when using Photoshop. Check the Adobe Site for updates.
I suspect some settings got mucked up during the migration from your Powerbook.

Cannot open dmg files in mavericks

After installing Mavericks on my iMac I cannot open dmg-files. All that happens is that the system tells me "The following disk images couldn't be opened", with the reason "no mountable file systems".
Now, all I can find when discussing this issue is that "your download is corrupted" or "check your disk" or "reinstall Mavericks!". I have checked and rechecked the files, they are complete and should work. My disk is checked and I have reinstalled Mavericks but nothing happens.
It seems to be a fairly new/rare problem, I can't find any discussion on this problem elsewhere...

I'm having the same problem. I don't have any answers. But here's some information about what I'm seeing that might help someone sort this out.
I recently upgraded to Mavericks
Both newly downloaded dmg files and ones that were downloaded and sucessfully opened under a previous version of OS X cannot be opened now
I have two user accounts on the same machine. On one I can open dmgs without problem. On the other I get the error.
I'm using the same browser (chrome) on both accounts to download the same disk image, with different results.
Both accounts are admin accounts
I transferred the disk image that opened properly on my main account to the second account's ~/public/drop box folder and the second account could not open the image.

Cannot translate .xls file

I'm trying to download and open a .xls file and the translator says it cannot translate it. Does anyone know how I can get it to work? I really need the spreadsheet!
I have an ibook g4. osx 10.4.6
Thank you in advance.

A possible reason for this may be that the .xls file was produced by the newest version of MS Excel.
You may be able to open it using NeoOffice, available from the NeoOffice website.
Regards,
Barry

Possible cause of "Cannot open Excel file error"?

Hi!
Here's my problem: one of our LabView applications creates .xls Excel
files. However some of these files are too big to be opened into
Excel, so we need to open these files in DIAdem to analyse the data (in
fact, even the smaller ones often need to be analysed in DIAdem).
The problem is that DIAdem seems totally unable to open Excel files,
small or big, created by our LabView application or not. The
error message appearing when we try to import Excel files is "Cannot
open Excel file"... which doesn't give any clue about the cause of the
error. My question is: what may cause this error to
occur? I searched both the help and the website without finding
useful information.
The computer is running on WinXP with OfficeXP installed, and we are
using DIAdem 9.0. If additionnal information is required, just
let me know.
Thanks in advance!
Maxime B.

Hi!
I did some experiments this morning. First of all, the file I had
created using Excel that I tried to open yesterday just opened. I
don't know why it didn't work yesterday, but, for now, it's
working. Now, for my LabView-created files, I still get the same
error message. However, if I open the files in Excel and try to
save, a warning message appears, saying that the file may not be
compatible with the text (separator:tabulation) format. If I
ignore the warning and save the file as a .xls file, I can now import
it into DIAdem. The problem is probably that my LabView-created
files are not "real" .xls files. Now, this is a problem, because
I can't open some of the bigger files in Excel without having the data
truncated (Excel has a maximum of 65536 rows); last year, using DIAdem
8.X (I don't remember the exact version we had), I could open those
files without any trouble... Is there any way to get those files to be
opened with DIAdem 9.0? I attached one of those files if it may help.
Thanks!
Maxime B.
Attachments:
Data1.xls ‏152 KB

I downloaded mountain lion and then the new office suite (word, ppt, excel) but now when I try to display one of my ppt's it says 'ppt cannot open the file...the file may be corrupt, in use, not a type recognized by ppt etc.." how can I fix it?? HELP

I downloaded mountain lion and then the new office suite (word, ppt, excel) but now when I try to display one of my ppt's it says 'ppt cannot open the file...the file may be corrupt, in use, not a type recognized by ppt etc.." how can I fix it?? HELP

Did you try to open teh fle by double-clicking its icon? If the file was made with an older version of Office, you may get that message. Try opeing PP and, from its "File" menu, see if you can open the ppt. I've foundthat often gets around that message and then yo ucan save the file from the newer version.
If that doesn't work, consider asking in the Microsoft Office: Mac forums here:
Office for Mac forums
PowerPoint is not an Apple product and it seems a lot of people around here avoid Office.

I am working in text edit and cannot open my file. Error message says it is in the wrong format, truncated or corrupted. what to do?

I am working in text edit and cannot open my file. Error message says it is in the wrong format, truncated or corrupted. what to do?

Try opening Disk Utility in your Applications-Utilities folder and repair permissions.

I cannot open pdf files from one supplier when using Adobe Reader but I can using another Viewer

I cannot open pdf files from one supplier when using Adobe Reader but I can open it if using Google PDF viewer or another viewer. The Adobe reader gives the error "There was an error opening this document. The file is damaged and could not be repaired" when I try to open the file. The version of Adobe Reader is 10.1.7, however I have tried other versions and they all fail the same way. I have tested on a number of different PC's in different networks and all fail using Adobe Reader but work using alternate viewer. Also the PC's will open a PDF from any other source.

Newer Reader versions are more strict than older versions (and other PDF viewers). If certain minimum requirements are not met, Reader will tell you that the PDF is damaged. This can happen when a document was created with software that does not adhere to PDF standards, or when the file was damaged during a download or email transmission.
You should contact the creator of these PDFs.

I cannot open xls files on my Imac in preview or numbers where as I used to be able to

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