Gmail attachment not opening on desktop

Here are some possible reasons why some files downloaded from a web browser Gmail session only open after renaming in a MacBook Pro:

• The file may be corrupted. This can happen if the download is interrupted or if the file is damaged in some way. To check if the file is corrupted, try opening it in a different program. If the file still does not open, then it is likely corrupted and you will need to download it again.
• The file may be in a format that your computer does not recognize. To check this, right-click on the file and select "Properties". The "Type of file" field will tell you what format the file is in. If you do not have a program that can open the file, you can try searching for a free or open-source program that can do so.
• The file may be blocked by your security software. To check this, open your security software and disable any settings that may be blocking the file. Once you have disabled the settings, try opening the file again.
• The file may be a virus or malware. If you suspect that the file may be infected, do not open it. Instead, scan the file with a virus scanner before opening it.

If you have tried all of these steps and the file still does not open, then you may need to contact the sender of the file for assistance.

Here are some additional tips to help you avoid problems when downloading files from Gmail:

• Make sure that you are downloading the file from a trusted source.
• Use a secure connection when downloading files.
• Do not open files from unknown senders.
• Keep your security software up to date.
• Scan files for viruses before opening them.

By following these tips, you can help to protect yourself from malware and other security threats.

Here are some additional steps you can take to troubleshoot the issue:

• Try downloading the file again.
• Try downloading the file to a different location.
• Try renaming the file.
• Try opening the file in a different program.
• Update your security software.
• Scan the file for viruses.

If you are still having trouble opening the file, you can contact the sender of the file for assistance.