Anand Pandit's Blog

Sometimes we might need to rename the GIT tags , this can be easily achieved by following these steps using GIT command line tool. git tag new-tag old-tag git tag -d old-tag git push origin :refs/tags/old-tag git push --tags

Sometimes we might have to know the list of users, groups and ids such as userid and groupid on macOS system. There are several ways to find this information.  dsacacheutil: The command  dscacheutil -q group   will output all groups with their name, ID numbers, and list of members. The command    dscacheutil -q user will output name,uid, gid, dir, shell, gecos details. Note:   The above command will output all the groups and user details , including built-in system ones mortals were never meant to see. Check user and group association: We can run below command to check user and group associations to know whether a user belongs to a group or not. dsmemberutil checkmembership -u 501 -g 1 user is not a member of the group Or dsmemberutil checkmembership -U user -G staff The user user cannot be found There was an unknown error. User not found Alternative methods to find group and user ...

One can use 64-bit testing mode in macOS 10.14 to test software for 64-bit compatibility. To enable the 64-bit testing mode: Boot to Recovery OS by restarting your machine and holding down the Command and R keys at startup. Launch Terminal Execute the following command: nvram boot-args="-no32exec" Restart the machine      Note:  The 64-bit testing mode prevents 32-bit processes from launching. Launching an app that depends on 32-bit software results in a notification that the application can't be opened.  To disable the 64-bit testing mode: Boot to Recovery OS by restarting your machine and holding down the Command and R keys at startup. Launch Terminal Execute the following command: nvram boot-args="" Restart the machine 

As per my old post ( http://anandmpandit.blogspot.in/2016/11/how-to-extract-signing-certificates.html ) , we can extract the binary signing certificates on mac using codesign tool. If you needed to get fingerprint details of the certificate in MD5, SHA1 or SHA256 format then you have run below steps on the extracted certificate file on macOS. SHA256: SHA256 Fingerprint=D3:0A:32:6C:77:77:93:B5:45:20:AC:C0:D4:7E:3A:84:34:50:96:54:08:7F:7D:63:4C:3E:06:3B:E8:1F:C1:90 SHA1: SHA1 Fingerprint=BF:2C:93:1F:BD:88:E5:4C:96:D8:86:D5:F1:E6:9B:B7:DE:76:51:62 MD5: MD5 Fingerprint=3C:A3:3B:76:6D:AE:3F:4B:4E:B2:AA:66:97:55:B8:76

Generally well known method to boot the mac into recovery mode is by holding the Command + R on keyboard while mac is turned on. However you can force the mac to boot into recovery mode upon next reboot by changing the nvram setting. To do that, Run below command.   sudo nvram "recovery-boot-mode=unused" sudo reboot

macOS SIP supports a set of hidden options to disable few sections of SIP by passing hidden options to csrutil tool.   Each of these can be selectively disabled by running one of the following commands while booted into Recovery mode: csrutil enable --no-internal csrutil enable --without kext csrutil  enable  --without fs csrutil  enable  --without debug csrutil  enable  --without dtrace csrutil  enable  --without nvram You can disable two or more components by structuring the command as follows: csrutil enable --without kext  --without debug How to disable /enable to SIP , refer to  http://anandmpandit.blogspot.in/2015/11/how-to-disable-system-integrity.html .  Note : These options are tested on macOS ElCapitan , on higher version of macOS some or all of them may not work.

The following command in terminal app renames the files located in directory to their corresponding md5 hash on macOS.  Steps: 1. Open Terminal.app and go to the directory containing files. 2. Run following command in terminal to rename files by MD5 on macOS. macOS-system$ for F in *.*; do mv $F "$(md5 "$F" | cut -d' ' -f4).${F##*.}"; done The above shell command renames all files in the current directory to their md5.