I am currently upgraded to Sierra on my mac and CS4 keeps crashing. Is there a way to fix this problem or do I need to upgrade to a newer version of Photoshop?
install OLD Java runtime if needed https://support.apple.com/kb/dl1572?locale=en_US
If the above doesn't help, you have upgraded your computer operating system past compatibility
Owners of old programs simply have problems with Mac El Capitan/Sierra... none of which is Adobe's fault... Adobe did not change your old program to make it stop working... Apple changed their operating system and THAT is why your old programs won't work, not because of anything Adobe did... Also... every time Apple issues an update, there is the risk that an old program that HAS been working will STOP working... bottom line, old programs require a matching old operating system