cannot be opened because it is from an unidentified developer mac?
34668
Launch System Preferences from the Apple  menu. Choose “Security & Privacy” and then click the “General” tab, followed by clicking the lock icon in the corner to unlock the settings. Look for “Allow applications downloaded from:” and choose “Anywhere” ... You can now launch any app from any location or developer.
402061
Judging on appearance alone, Advanced Mac Cleaner might seem legitimate, however, it is a potentially unwanted program (PUP) that typically infiltrates systems without users' consent. ... In fact, this program is a scam and the claims and list of errors are false - your system is likely to be completely safe and optimized.
396505
It's a scam product. Non-Apple Mac OS X utility software is generally only worth using for specific tasks, and then only by researching the products or getting recommendations to address an issue instead of accepting ones offered in unsolicited popups. This is a Scam. Don't get fooled by such applications.
379420
["Your computer's startup disk may not have enough free disk space. ... ", "An app you're using may require more memory than your Mac has easily available. ... ", "Quit any app that isn't compatible with your Mac. ... ", "Quit any apps you're not using.", 'If you have problems with your disk, use Disk Utility to verify and try to fix any issues.']
677909
['Download the . zip file (e.g. [Python]: python-3.6. 5-embed-amd64. zip) on your computer, in an empty dir (on my machine it\'s: "e:\\Work\\Dev\\StackOverflow\\q050818078\\python36x64")', 'Unzip the file (some (. pyd, . dll, .exe, . zip, . _pth) files will appear).']
193007
['Connect an inaccessible device such as a hard drive, external hard drive, USB or SD card to your PC.', 'Open "This PC/My Computer" > Right-click on the inaccessible device or file folder and select "Properties".', 'Click the Tools Tab > Click "Check/Check Now".']
596165
['Restart the troubled program.', 'Change compatibility settings.', 'Run the program as administrator.', 'Scan for malware.', 'Clean Registry values.', 'Clean temporary files.', 'Run SFC and DISM.', 'Change Permissions.']
680121
['Go to the Applications folder via Go > Applications in Finder or using the shortcut Shift + Command + A .', 'Scroll through the list and delete any unknown applications.', 'Then empty the trash.']
878113
['Important information for Macs with the T2 security chip.', 'Step 1: Back up your Mac.', 'Step 2: Create a bootable drive of macOS Mojave.', 'Step 3: Erase macOS Catalina.', 'Step 4: Reinstall macOS Mojave.', 'Step 5: Restore data from an earlier macOS Mojave Time machine backup.']
145036
The “is not recognized as an internal command” error usually occurs because the computer can't find the executable that you're asking it to launch. However, you can provide it with the full path to your executable file and it should then be able to run it without any issues.
205610
["Step 1: Try Different Software Programs. If you can't open ERX files, you may not have the right program installed on your computer. ... ", 'Step 2: Use the File Type as a Hint. ... ', 'Step 3: Ask a Developer. ... ', 'Step 4: Use a Universal File Viewer.']
1471559
['Step 1] Check if the program actually exists in the system. Since you might not be able to Run the program, try checking if its .exe file exists at the location C:\\Windows\\System32\\. ... ', 'Step 2] Modify Environment Variables.']
1110614
["Navigate to the file or program that's being blocked by SmartScreen.", 'Right-click the file.', 'Click Properties.', 'Click the checkbox next to Unblock so that a checkmark appears.', 'Click Apply.']
538716
['In the Finder on your Mac, choose Go > Go to Folder.', 'Enter /Users/[username]/Public, then click Go.', 'Drag the item (or a copy of it) into the Drop Box folder.']
1072677
['Click and open Finder from the dock.', 'Click on Applications then double click on Utilities.', 'Double click on Keychain Access to open the application. Note: From the window below, you can view saved passwords and certificates. Keychain password is required to gain access.']
49145
['Manually open the folder for which the access is denied.', 'Select the Executable/application file in that folder.', 'Right click on it and go to PROPERTIES -> COMPATIBILITY.', 'Now see the PRIVILEGE LEVEL and check it for RUN AS ADMINISTRATOR.', 'Then click on CHANGE SETTING FOR ALL USERS.']
1379397
['Download Disk Drill for Mac for free. ... ', "Install the app and provide your administrator's password when prompted.", 'Launch the tool and choose the drive where the recovery will be performed.']