install error

[NAMEs]

ERROR: Could not find a version that satisfies the requirement tensorflow-addons==0.8.1
ERROR: No matching distribution found for tensorflow-addons==0.8.1
ERROR: Could not find a version that satisfies the requirement tensorflow==1.9.0
ERROR: No matching distribution found for tensorflow==1.9.0

[eshijia]

提供系统版本、python版本等相关环境信息

[NAMEs]

Python 3.7.3 (venv,default, Mar 27 2019, 09:23:15)

Mac OS X (10.14.2)