"Please Check Gdb Is Codesigned - See Taskgated(8)" - How to Get Gdb Installed with Homebrew Code Signed

How to get a codesigned gdb on OSX?

It would seem you need to sign the executable. See these links for more information. You should be able to get away with self signing if you don't plan on redistributing that version of gdb.

https://developer.apple.com/library/mac/#documentation/Security/Conceptual/CodeSigningGuide/Introduction/Introduction.html

https://developer.apple.com/library/mac/#documentation/Darwin/Reference/Manpages/man1/codesign.1.html

Alternatively, you could disable code signing on your system, although this presents a security risk. To do so try running sudo spctl --master-disable in the Terminal.

macOS Mojave: How to achieve codesign to enable debugging (gdb)?

This is related to codesign entitlements. you must add "com.apple.security.cs.debugger" key in signing process.

for example you must change codesign -fs gdbcert /usr/local/bin/gdb to codesign --entitlements gdb.xml -fs gdbcert /usr/local/bin/gdb .

gdb.xml content must something like following code.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>com.apple.security.cs.debugger</key>
    <true/>
</dict>
</plist>

codesigned errors when using gdb on macos Mojave 10.14

gdb codesigning will need proper entitlements in 10.14+:
https://sourceware.org/gdb/wiki/PermissionsDarwin

Edit: Now you are probably duplicating this error which requires downgrading gdb gdb-doesnt-work-on-macos-high-sierra-10-13-3… answer has instructions.

Edit 2: it looks like upgrading to gdb 8.3 should work for you now.

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