Q: Is the Dashlane password manger a good option for OS X and IOS users?

I use it and like it. It works very well for me. Another option is iCloud Keychain. I haven't used it myself because I need something that will work with Windows as well as OS X and iOS, but it is free and you may want to evaluate it: Frequently asked questions about iCloud Keychain - Apple Support

http://www.macworld.com/article/2058081/how-to-use-icloud-keychain.html

Frequently asked questions about iCloud Keychain - Apple Support

http://www.imore.com/icloud-keychain-ultimate-guide

http://www.imore.com/icloud-keychain

http://www.imore.com/how-access-icloud-keychain-passwords-credit-cards

I use 1Password on my various Macs and iPhone.  It is not the cheapest, but I've been using it for a long time.  Syncing is via iCloud or Dropbox.  The syncing works very well for me.  My password updates are almost immediately available on all my devices as soon as I change them.  The iPhone uses finger print unlocking (unless you have just restarted the iPhone, then it takes the password the first time).

Hello!

Thank you for your interest in Dashlane!

Please note that our User Support is available to answer any question you would have regarding the application. We can also provide help in installing the app on Mac OS X and iOS if you wish.

Feel free to use the contact form available on our help center to get in touch with the team!

Kind regards,

Dashlane User Support Team

Plus 1 for BobHarris' recommendation of 1 Password. There was a trial version, which still may be available. If you monitor the App Store, it goes on sale once in awhile for about $20 less.

1Password