No computer is ever going to go wrong, and even the best Mac can, so it's possible to encounter error codes on your Mac. Below, we've listed some of the most common error codes encountered on a Mac, and how to fix them.
5 Most Common Mac Error Codes
1. Error code 41 
Error code 41 may pop up in multiple applications and operations, you will often see "Memory is full (open) or file does not fit (load)" or "Unable to load Finder error" information.
It often indicates that some software or hardware on your Mac is outdated, but error code 41 can also pop up from system files or directories that have been corrupted or compromised by malware.
To fix error code 41, update the software that's giving the error, or possibly uninstall the program completely and reinstall a clean version of it. Updating macOS to the latest version can also help.
Checking your Mac for viruses and clearing junk and cache files can also help fix error code 41.
If at any point you encounter error code 1309, updating software and macOS can also help.
2. Error code 50 
Error code 50 occurs when your Mac cannot move or copy files from a portable storage device such as an external hard drive. This can happen because of corrupted or damaged file data, a firmware issue, or a communication issue between the Mac and the storage device.
This error code can be fixed by giving the file a new name before opening it or giving it a new name before moving it. Changing the file's extension and then changing it back after the move also helps.
You can also run Disk Utility on your Mac, then choose First Aid > Run on your storage device and your Mac's hard drive. This fixes communication errors between devices and can remove error code 50 for you.
3. Error code 8003 Error 
code 8003 is displayed if you try to delete files from your Mac's Trash, but your Mac cannot complete the operation due to permission issues with what you deleted.
There may be other reasons as well, but the error code to resolve is the same: hold down the Option key on the keyboard while clicking the Empty Recycle Bin button on the Recycle Bin. This will force the trash to be emptied and delete any locked files that you cannot unlock.
You can also start your Mac in Safe Mode or use Terminal to see which application is using the file you want to delete and close that program to avoid error 8003 and empty the Trash completely.
4. Error code 36 
If the Finder cannot read or write files, you will see error code 36 on your Mac. Like error code 50, this usually happens when you try to copy or move files between devices. But error code 36 is caused by invisible .DS_Store files.
To correct error code 36, you need to delete these .DS_Store files. You can do this by opening the Terminal application and entering the command dot_clean followed by a space.
Next, drag and drop the folder or memory card containing the file that produced the error into the terminal window and press Return on your keyboard. The .DS_Store file should now be merged with the original, and you should be able to move or copy files without errors.
5. Error code 2003f 
If your Mac is having trouble installing a new macOS update, you will encounter error code 2003f. This happens most often when users try to reformat their Mac via macOS Recovery but their internet connection is poor or unstable.
One of the easiest ways to fix this error is to connect to the internet via Ethernet instead of Wi-Fi. Connecting to a new Wi-Fi or Ethernet network will also work. It's also worth running Disk Utility and selecting First Aid > Run, like error code 50.
If error code 2003f persists, restart your Mac and hold down Command + R when the Apple logo appears. The MacOS Tools window will open. Select Reinstall macOS, enter your Apple ID information, and follow any on-screen instructions.
These fixes also work if you experience error codes 2002f, 2100f, and 1008f.