Could not find a version that satisfies the requirement tensorflow

[markusvankempen]

Getting Error on a Mac .... when installing training requirements
ERROR: Could not find a version that satisfies the requirement tensorflow==1.11 (from donkeypart_keras_behavior_cloning->-r train_requirements.txt (line 2)) (from versions: 1.13.0rc1, 1.13.0rc2, 1.13.1, 1.13.2, 1.14.0rc0, 1.14.0rc1, 1.14.0, 2.0.0a0, 2.0.0b0, 2.0.0b1, 2.0.0rc0)
ERROR: No matching distribution found for tensorflow==1.11 (from donkeypart_keras_behavior_cloning->-r train_requirements.txt (line 2))