Josh's recommendation about Apple's Logic is quite good since it is the only in-house pro audio software developed by Apple. Its essentially just an amped up version of GarageBand which comes with all new Macs.
Since no one has listed any of the others I will list all of the notable ones by a few categories and will explain the common pros and cons associated with each (newest version is how I will name them). Only going to list the ones with the features you mentioned and ones that work on Macs:
I was going to mention the free options first, but after thinking about it, none of the free software options available will come even close to what you are used to with Acid Pro.
One thing to keep in mind is that I will mention commonly stated opinions I have heard from professional artists, friends, and online forums but will save my opinion for last. But to be real, any of the options I'm going to mention will help you get to where you want to go with only differing routes. It really just depends on how much effort you are willing to put into the journey.
The low-cost or lesser-known options:
Reaper 4 is a commonly recommended DAW for beginners or people looking for DAWs with low-cost. It has a great community of dedicated users and good forum with great responses but it is on the small side of DAW communities. Some people don't consider it to have the same "professional sound" they can achieve with other software. Some people have complained about it having a slow "learning curve" but I believe this is because many people that use it are new to DAWs and of course aren't going to learn things as quickly when they have no knowledge base.
GarageBand is of course an option if you don't have any money and it comes free with every new Mac. Only downside is that is more limited than any other DAW I will oh have mentioned.
MuTools MuLab 4 is one of those very under the radar DAWs. It is cheap but there is a reason for that. It lacks many of the features that the more expensive DAWs have, but is just fine if you will only be doing the basics, editing, recording, simple effects, etc.
Renoise is a DAW I'm not familiar with but here is what I've gathered. It is insanely cheap for all the features it boosts. It is a very stable piece of software on any OS. Its a little backwards when it comes to normal organization (top-down instead of left to right) which makes it difficult to work with really long samples.
MOTU Digital Preformer is a lesser used DAW which was until very recently a Mac-only piece of Software. It is well liked by one of my friends. He has stuck with it for a while which could be the reason. The most common downside is that some people consider it to have a very high learning curve.
The "Pro" Level Options
Steinberg Cubase 6.5 is a very popular option. It has a large user base, great community, forum, customer service, and has a great reputation. Steinberg has been around longer than most other software companies that create music software so that is it a big plus. Cubase is just an overall great piece of software.
Propellerhead Reason is another great piece of software. One of the pros of Reason is that you can do everything with it that any other DAW can do without needing any outside software or plugins but that's right where the con comes in. Reason doesn't work with any outside plugins (VST, AU, RTAS, etc) which people who have some favorite plugins see as a huge downside.
Albeton Live 8 is a great DAW. Some people get confused with it being called a DAW since it was initially a performance based audio looping software. While it still has this function (its still the default home screen), its sequencer view is where the typical DAW look comes into play. It has won Synthtopia's best DAW in the world poll a few times. Downside is how that layout confuses some people.
Apple Logic Pro 9 is also a great piece of software (the on that Josh mentioned). The fact that it is Apples in-house software doesn't mean it is any better or worse than any other DAW (and you have to buy it separately anyways). It is still an awesome piece of software. Fairly straightforward (at least if you understand how other DAWs work) and has everything necessary built in (but all the "pro" level DAWs do as well).
Last but not least, Avid ProTools 10 is the industry standard for recording, producing, and editing audio. Almost any song you hear played on the radio or on a commercial nowadays has been recorded and produced in Pro Tools. A surprising thing to note is that despite how ProTools is accepted industry wide as the standard, it is not as popular as you would expect within different music communities. This is most likely due to the perceived complex nature of it. I'm picking it up with with almost zero problems so I don't understand why this is.
My Opinion and Recommendation
To give a personal recommendation, I would go with any of the "pro" level DAWs. They all have their pros and cons and luckily for you they each have a free trial available, so you can try each one out and see which you like the best. My favorite two are Ableton, because of how long I've used it, and ProTools, simply because of the fact that its the industry standard and how I've had no problem using it so far. I used FL Studio for a long time but had to make a change once I had to pick a DAW that would work between my computers which is why I picked up Ableton originally.
I've used Cubase, Reason, and Logic as well and didn't have any major problems with any of them (except with how I couldn't use my favorite plugins in Reason
>:( but thats just personal choice). Even came up with some pretty cool songs (IMO) with some friends.
If I had to choose one of the low-cost DAWs I would go with Reaper just because of how popular it is, the fact I used it without any problems, and the fact of how devoted the fanbase for it is.