Increasing output current of DAC
Many opamps have a max current in the 30mA to 50mA, especially ones that are rail to rail. 60mA is hard to find, and opamps with a max current of more that 200mA are very few.

The best way is to use a rail to rail opamp in a voltage follower configuration. Because the op amp can introduce errors, select one that has a low input voltage offset. Either set the voltage rail above the range of the DAC to avoid common mode problems, or get a rail to rail opamp. Maybe paralleling the ADA4522 might work.

Or you can parallel any op amp: 


Source: How to increase the rated output voltage/current by connecting multiple op amps?

OR like this:


Source:
https://www.analog.com/en/technical-articles/paralleling-amplifiers-increases-output-drive.html

Paralleling can increase current output, however, series resistors are needed on the output of the amp which can introduce error and require analysis to see if it will fit your application.